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Finding the Fourth Proportional to 102.15, 152.17 and 101.66

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Solution

The fourth proportional to 102.15, 152.17 and 101.66 is: 151.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.15 : 152.17 = 101.66 : x
  2. Step 2: Convert to fraction form
    102.15/152.17 = 101.66/x
  3. Step 3: Cross multiply
    102.15x = 152.17 × 101.66
  4. Step 4: Simplify right side
    102.15x = 15,468.59
  5. Step 5: Solve for x
    x = 15,468.59/102.15
  6. Step 6: Final answer
    x = 151.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.