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Finding the Fourth Proportional to 232.10, 348.18 and 85.86

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Solution

The fourth proportional to 232.10, 348.18 and 85.86 is: 128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.10 : 348.18 = 85.86 : x
  2. Step 2: Convert to fraction form
    232.10/348.18 = 85.86/x
  3. Step 3: Cross multiply
    232.10x = 348.18 × 85.86
  4. Step 4: Simplify right side
    232.10x = 29,894.73
  5. Step 5: Solve for x
    x = 29,894.73/232.10
  6. Step 6: Final answer
    x = 128.80

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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.