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Finding the Fourth Proportional to 87.17, 130.82 and 35.82

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Solution

The fourth proportional to 87.17, 130.82 and 35.82 is: 53.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.17 : 130.82 = 35.82 : x
  2. Step 2: Convert to fraction form
    87.17/130.82 = 35.82/x
  3. Step 3: Cross multiply
    87.17x = 130.82 × 35.82
  4. Step 4: Simplify right side
    87.17x = 4,685.79
  5. Step 5: Solve for x
    x = 4,685.79/87.17
  6. Step 6: Final answer
    x = 53.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.