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Finding the Fourth Proportional to 74,699.20, 112,048.80 and 66,534.40

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Solution

The fourth proportional to 74,699.20, 112,048.80 and 66,534.40 is: 99,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,699.20 : 112,048.80 = 66,534.40 : x
  2. Step 2: Convert to fraction form
    74,699.20/112,048.80 = 66,534.40/x
  3. Step 3: Cross multiply
    74,699.20x = 112,048.80 × 66,534.40
  4. Step 4: Simplify right side
    74,699.20x = 7,455,099,678.72
  5. Step 5: Solve for x
    x = 7,455,099,678.72/74,699.20
  6. Step 6: Final answer
    x = 99,801.60

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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.