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Finding the Fourth Proportional to 92.92, 140.07 and 87.68

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Solution

The fourth proportional to 92.92, 140.07 and 87.68 is: 132.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.92 : 140.07 = 87.68 : x
  2. Step 2: Convert to fraction form
    92.92/140.07 = 87.68/x
  3. Step 3: Cross multiply
    92.92x = 140.07 × 87.68
  4. Step 4: Simplify right side
    92.92x = 12,281.34
  5. Step 5: Solve for x
    x = 12,281.34/92.92
  6. Step 6: Final answer
    x = 132.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.