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Finding the Fourth Proportional to 147.35, 220.85 and 113

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Solution

The fourth proportional to 147.35, 220.85 and 113 is: 169.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.35 : 220.85 = 113 : x
  2. Step 2: Convert to fraction form
    147.35/220.85 = 113/x
  3. Step 3: Cross multiply
    147.35x = 220.85 × 113
  4. Step 4: Simplify right side
    147.35x = 24,955.49
  5. Step 5: Solve for x
    x = 24,955.49/147.35
  6. Step 6: Final answer
    x = 169.37

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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.