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Finding the Fourth Proportional to 113.30, 155.13 and 112.95

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Solution

The fourth proportional to 113.30, 155.13 and 112.95 is: 154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.30 : 155.13 = 112.95 : x
  2. Step 2: Convert to fraction form
    113.30/155.13 = 112.95/x
  3. Step 3: Cross multiply
    113.30x = 155.13 × 112.95
  4. Step 4: Simplify right side
    113.30x = 17,522.15
  5. Step 5: Solve for x
    x = 17,522.15/113.30
  6. Step 6: Final answer
    x = 154.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.