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Finding the Fourth Proportional to 61,761.89, 85,200.10 and 39,062.65

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Solution

The fourth proportional to 61,761.89, 85,200.10 and 39,062.65 is: 53,886.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,761.89 : 85,200.10 = 39,062.65 : x
  2. Step 2: Convert to fraction form
    61,761.89/85,200.10 = 39,062.65/x
  3. Step 3: Cross multiply
    61,761.89x = 85,200.10 × 39,062.65
  4. Step 4: Simplify right side
    61,761.89x = 3,328,141,375.61
  5. Step 5: Solve for x
    x = 3,328,141,375.61/61,761.89
  6. Step 6: Final answer
    x = 53,886.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.