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Finding the Fourth Proportional to 142.62, 196.71 and 93.55

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Solution

The fourth proportional to 142.62, 196.71 and 93.55 is: 129.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.62 : 196.71 = 93.55 : x
  2. Step 2: Convert to fraction form
    142.62/196.71 = 93.55/x
  3. Step 3: Cross multiply
    142.62x = 196.71 × 93.55
  4. Step 4: Simplify right side
    142.62x = 18,402.22
  5. Step 5: Solve for x
    x = 18,402.22/142.62
  6. Step 6: Final answer
    x = 129.03

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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.