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Finding the Fourth Proportional to 99,794.80, 137,731.96 and 62,081.20

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Solution

The fourth proportional to 99,794.80, 137,731.96 and 62,081.20 is: 85,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794.80 : 137,731.96 = 62,081.20 : x
  2. Step 2: Convert to fraction form
    99,794.80/137,731.96 = 62,081.20/x
  3. Step 3: Cross multiply
    99,794.80x = 137,731.96 × 62,081.20
  4. Step 4: Simplify right side
    99,794.80x = 8,550,565,355.15
  5. Step 5: Solve for x
    x = 8,550,565,355.15/99,794.80
  6. Step 6: Final answer
    x = 85,681.47

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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.