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Finding the Fourth Proportional to 90,717,784.90, 136,076,677.35 and 82,214,728.90

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Solution

The fourth proportional to 90,717,784.90, 136,076,677.35 and 82,214,728.90 is: 123,322,093.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,717,784.90 : 136,076,677.35 = 82,214,728.90 : x
  2. Step 2: Convert to fraction form
    90,717,784.90/136,076,677.35 = 82,214,728.90/x
  3. Step 3: Cross multiply
    90,717,784.90x = 136,076,677.35 × 82,214,728.90
  4. Step 4: Simplify right side
    90,717,784.90x = 11,187,507,137,943,020
  5. Step 5: Solve for x
    x = 11,187,507,137,943,020/90,717,784.90
  6. Step 6: Final answer
    x = 123,322,093.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.