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Finding the Fourth Proportional to 95,688, 142,521.21 and 90,691.92

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Solution

The fourth proportional to 95,688, 142,521.21 and 90,691.92 is: 135,079.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,688 : 142,521.21 = 90,691.92 : x
  2. Step 2: Convert to fraction form
    95,688/142,521.21 = 90,691.92/x
  3. Step 3: Cross multiply
    95,688x = 142,521.21 × 90,691.92
  4. Step 4: Simplify right side
    95,688x = 12,925,522,175.62
  5. Step 5: Solve for x
    x = 12,925,522,175.62/95,688
  6. Step 6: Final answer
    x = 135,079.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.