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Finding the Fourth Proportional to 113.04, 169.20 and 89.04

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Solution

The fourth proportional to 113.04, 169.20 and 89.04 is: 133.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.04 : 169.20 = 89.04 : x
  2. Step 2: Convert to fraction form
    113.04/169.20 = 89.04/x
  3. Step 3: Cross multiply
    113.04x = 169.20 × 89.04
  4. Step 4: Simplify right side
    113.04x = 15,065.57
  5. Step 5: Solve for x
    x = 15,065.57/113.04
  6. Step 6: Final answer
    x = 133.28

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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.