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Finding the Fourth Proportional to 72,437.10, 108,655.65 and 63,681.90

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Solution

The fourth proportional to 72,437.10, 108,655.65 and 63,681.90 is: 95,522.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,437.10 : 108,655.65 = 63,681.90 : x
  2. Step 2: Convert to fraction form
    72,437.10/108,655.65 = 63,681.90/x
  3. Step 3: Cross multiply
    72,437.10x = 108,655.65 × 63,681.90
  4. Step 4: Simplify right side
    72,437.10x = 6,919,398,237.74
  5. Step 5: Solve for x
    x = 6,919,398,237.74/72,437.10
  6. Step 6: Final answer
    x = 95,522.85

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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.