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Finding the Fourth Proportional to 87.83, 131.81 and 60.69

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Solution

The fourth proportional to 87.83, 131.81 and 60.69 is: 91.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.83 : 131.81 = 60.69 : x
  2. Step 2: Convert to fraction form
    87.83/131.81 = 60.69/x
  3. Step 3: Cross multiply
    87.83x = 131.81 × 60.69
  4. Step 4: Simplify right side
    87.83x = 7,999.25
  5. Step 5: Solve for x
    x = 7,999.25/87.83
  6. Step 6: Final answer
    x = 91.08

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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.