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Finding the Fourth Proportional to 99,540.80, 137,317.92 and 63,702.08

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Solution

The fourth proportional to 99,540.80, 137,317.92 and 63,702.08 is: 87,877.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,540.80 : 137,317.92 = 63,702.08 : x
  2. Step 2: Convert to fraction form
    99,540.80/137,317.92 = 63,702.08/x
  3. Step 3: Cross multiply
    99,540.80x = 137,317.92 × 63,702.08
  4. Step 4: Simplify right side
    99,540.80x = 8,747,437,125.27
  5. Step 5: Solve for x
    x = 8,747,437,125.27/99,540.80
  6. Step 6: Final answer
    x = 87,877.91

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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.