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Finding the Fourth Proportional to 154.17, 212.85 and 132.30

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Solution

The fourth proportional to 154.17, 212.85 and 132.30 is: 182.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.17 : 212.85 = 132.30 : x
  2. Step 2: Convert to fraction form
    154.17/212.85 = 132.30/x
  3. Step 3: Cross multiply
    154.17x = 212.85 × 132.30
  4. Step 4: Simplify right side
    154.17x = 28,160.06
  5. Step 5: Solve for x
    x = 28,160.06/154.17
  6. Step 6: Final answer
    x = 182.66

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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.