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Finding the Fourth Proportional to 72,431.10, 108,646.65 and 63,675.90

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Solution

The fourth proportional to 72,431.10, 108,646.65 and 63,675.90 is: 95,513.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,431.10 : 108,646.65 = 63,675.90 : x
  2. Step 2: Convert to fraction form
    72,431.10/108,646.65 = 63,675.90/x
  3. Step 3: Cross multiply
    72,431.10x = 108,646.65 × 63,675.90
  4. Step 4: Simplify right side
    72,431.10x = 6,918,173,220.74
  5. Step 5: Solve for x
    x = 6,918,173,220.74/72,431.10
  6. Step 6: Final answer
    x = 95,513.85

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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.