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Finding the Fourth Proportional to 61,691.96, 92,310.62 and 54,615.80

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Solution

The fourth proportional to 61,691.96, 92,310.62 and 54,615.80 is: 81,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,691.96 : 92,310.62 = 54,615.80 : x
  2. Step 2: Convert to fraction form
    61,691.96/92,310.62 = 54,615.80/x
  3. Step 3: Cross multiply
    61,691.96x = 92,310.62 × 54,615.80
  4. Step 4: Simplify right side
    61,691.96x = 5,041,618,359.80
  5. Step 5: Solve for x
    x = 5,041,618,359.80/61,691.96
  6. Step 6: Final answer
    x = 81,722.45

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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.