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Finding the Fourth Proportional to 71,361.48, 98,479.68 and 39,531

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Solution

The fourth proportional to 71,361.48, 98,479.68 and 39,531 is: 54,553.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,361.48 : 98,479.68 = 39,531 : x
  2. Step 2: Convert to fraction form
    71,361.48/98,479.68 = 39,531/x
  3. Step 3: Cross multiply
    71,361.48x = 98,479.68 × 39,531
  4. Step 4: Simplify right side
    71,361.48x = 3,893,000,230.08
  5. Step 5: Solve for x
    x = 3,893,000,230.08/71,361.48
  6. Step 6: Final answer
    x = 54,553.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.