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Finding the Fourth Proportional to 87.05, 131.18 and 82.93

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Solution

The fourth proportional to 87.05, 131.18 and 82.93 is: 124.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.05 : 131.18 = 82.93 : x
  2. Step 2: Convert to fraction form
    87.05/131.18 = 82.93/x
  3. Step 3: Cross multiply
    87.05x = 131.18 × 82.93
  4. Step 4: Simplify right side
    87.05x = 10,878.76
  5. Step 5: Solve for x
    x = 10,878.76/87.05
  6. Step 6: Final answer
    x = 124.97

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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.