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Finding the Fourth Proportional to 102.42, 141.37 and 58.79

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Solution

The fourth proportional to 102.42, 141.37 and 58.79 is: 81.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.42 : 141.37 = 58.79 : x
  2. Step 2: Convert to fraction form
    102.42/141.37 = 58.79/x
  3. Step 3: Cross multiply
    102.42x = 141.37 × 58.79
  4. Step 4: Simplify right side
    102.42x = 8,310.29
  5. Step 5: Solve for x
    x = 8,310.29/102.42
  6. Step 6: Final answer
    x = 81.14

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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.