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Finding the Fourth Proportional to 90,796.80, 136,486.80 and 64,682.40

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Solution

The fourth proportional to 90,796.80, 136,486.80 and 64,682.40 is: 97,231.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,796.80 : 136,486.80 = 64,682.40 : x
  2. Step 2: Convert to fraction form
    90,796.80/136,486.80 = 64,682.40/x
  3. Step 3: Cross multiply
    90,796.80x = 136,486.80 × 64,682.40
  4. Step 4: Simplify right side
    90,796.80x = 8,828,293,792.32
  5. Step 5: Solve for x
    x = 8,828,293,792.32/90,796.80
  6. Step 6: Final answer
    x = 97,231.33

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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.