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Finding the Fourth Proportional to 142.59, 196.84 and 93.55

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Solution

The fourth proportional to 142.59, 196.84 and 93.55 is: 129.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.59 : 196.84 = 93.55 : x
  2. Step 2: Convert to fraction form
    142.59/196.84 = 93.55/x
  3. Step 3: Cross multiply
    142.59x = 196.84 × 93.55
  4. Step 4: Simplify right side
    142.59x = 18,414.15
  5. Step 5: Solve for x
    x = 18,414.15/142.59
  6. Step 6: Final answer
    x = 129.14

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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.