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Finding the Fourth Proportional to 154.85, 232.31 and 52.13

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Solution

The fourth proportional to 154.85, 232.31 and 52.13 is: 78.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.85 : 232.31 = 52.13 : x
  2. Step 2: Convert to fraction form
    154.85/232.31 = 52.13/x
  3. Step 3: Cross multiply
    154.85x = 232.31 × 52.13
  4. Step 4: Simplify right side
    154.85x = 12,109.63
  5. Step 5: Solve for x
    x = 12,109.63/154.85
  6. Step 6: Final answer
    x = 78.20

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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.