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Finding the Fourth Proportional to 113.31, 169.17 and 93.06

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Solution

The fourth proportional to 113.31, 169.17 and 93.06 is: 138.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.31 : 169.17 = 93.06 : x
  2. Step 2: Convert to fraction form
    113.31/169.17 = 93.06/x
  3. Step 3: Cross multiply
    113.31x = 169.17 × 93.06
  4. Step 4: Simplify right side
    113.31x = 15,742.96
  5. Step 5: Solve for x
    x = 15,742.96/113.31
  6. Step 6: Final answer
    x = 138.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.