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Finding the Fourth Proportional to 102.35, 141.13 and 69.61

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Solution

The fourth proportional to 102.35, 141.13 and 69.61 is: 95.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.35 : 141.13 = 69.61 : x
  2. Step 2: Convert to fraction form
    102.35/141.13 = 69.61/x
  3. Step 3: Cross multiply
    102.35x = 141.13 × 69.61
  4. Step 4: Simplify right side
    102.35x = 9,824.06
  5. Step 5: Solve for x
    x = 9,824.06/102.35
  6. Step 6: Final answer
    x = 95.98

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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.