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Finding the Fourth Proportional to 87.68, 121.04 and 60.11

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Solution

The fourth proportional to 87.68, 121.04 and 60.11 is: 82.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.68 : 121.04 = 60.11 : x
  2. Step 2: Convert to fraction form
    87.68/121.04 = 60.11/x
  3. Step 3: Cross multiply
    87.68x = 121.04 × 60.11
  4. Step 4: Simplify right side
    87.68x = 7,275.71
  5. Step 5: Solve for x
    x = 7,275.71/87.68
  6. Step 6: Final answer
    x = 82.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.