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Finding the Fourth Proportional to 102.39, 153.71 and 93.90

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Solution

The fourth proportional to 102.39, 153.71 and 93.90 is: 140.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.39 : 153.71 = 93.90 : x
  2. Step 2: Convert to fraction form
    102.39/153.71 = 93.90/x
  3. Step 3: Cross multiply
    102.39x = 153.71 × 93.90
  4. Step 4: Simplify right side
    102.39x = 14,433.37
  5. Step 5: Solve for x
    x = 14,433.37/102.39
  6. Step 6: Final answer
    x = 140.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.