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Finding the Fourth Proportional to 62,781.98, 86,639.72 and 34,487.64

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Solution

The fourth proportional to 62,781.98, 86,639.72 and 34,487.64 is: 47,593.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,781.98 : 86,639.72 = 34,487.64 : x
  2. Step 2: Convert to fraction form
    62,781.98/86,639.72 = 34,487.64/x
  3. Step 3: Cross multiply
    62,781.98x = 86,639.72 × 34,487.64
  4. Step 4: Simplify right side
    62,781.98x = 2,987,999,300.62
  5. Step 5: Solve for x
    x = 2,987,999,300.62/62,781.98
  6. Step 6: Final answer
    x = 47,593.27

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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.