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Finding the Fourth Proportional to 72,547.79, 108,693.05 and 61,909.88

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Solution

The fourth proportional to 72,547.79, 108,693.05 and 61,909.88 is: 92,755.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,547.79 : 108,693.05 = 61,909.88 : x
  2. Step 2: Convert to fraction form
    72,547.79/108,693.05 = 61,909.88/x
  3. Step 3: Cross multiply
    72,547.79x = 108,693.05 × 61,909.88
  4. Step 4: Simplify right side
    72,547.79x = 6,729,172,829.32
  5. Step 5: Solve for x
    x = 6,729,172,829.32/72,547.79
  6. Step 6: Final answer
    x = 92,755.04

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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.