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Finding the Fourth Proportional to 87.04, 131.17 and 87.04

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Solution

The fourth proportional to 87.04, 131.17 and 87.04 is: 131.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.04 : 131.17 = 87.04 : x
  2. Step 2: Convert to fraction form
    87.04/131.17 = 87.04/x
  3. Step 3: Cross multiply
    87.04x = 131.17 × 87.04
  4. Step 4: Simplify right side
    87.04x = 11,417.04
  5. Step 5: Solve for x
    x = 11,417.04/87.04
  6. Step 6: Final answer
    x = 131.17

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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.