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Finding the Fourth Proportional to 154.92, 232.72 and 130.76

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Solution

The fourth proportional to 154.92, 232.72 and 130.76 is: 196.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.92 : 232.72 = 130.76 : x
  2. Step 2: Convert to fraction form
    154.92/232.72 = 130.76/x
  3. Step 3: Cross multiply
    154.92x = 232.72 × 130.76
  4. Step 4: Simplify right side
    154.92x = 30,430.47
  5. Step 5: Solve for x
    x = 30,430.47/154.92
  6. Step 6: Final answer
    x = 196.43

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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.