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Finding the Fourth Proportional to 61,685.38, 92,404.72 and 28,359.78

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Solution

The fourth proportional to 61,685.38, 92,404.72 and 28,359.78 is: 42,482.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,685.38 : 92,404.72 = 28,359.78 : x
  2. Step 2: Convert to fraction form
    61,685.38/92,404.72 = 28,359.78/x
  3. Step 3: Cross multiply
    61,685.38x = 92,404.72 × 28,359.78
  4. Step 4: Simplify right side
    61,685.38x = 2,620,577,530.16
  5. Step 5: Solve for x
    x = 2,620,577,530.16/61,685.38
  6. Step 6: Final answer
    x = 42,482.96

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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.