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Finding the Fourth Proportional to 147.15, 203.12 and 112.18

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Solution

The fourth proportional to 147.15, 203.12 and 112.18 is: 154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.15 : 203.12 = 112.18 : x
  2. Step 2: Convert to fraction form
    147.15/203.12 = 112.18/x
  3. Step 3: Cross multiply
    147.15x = 203.12 × 112.18
  4. Step 4: Simplify right side
    147.15x = 22,785.77
  5. Step 5: Solve for x
    x = 22,785.77/147.15
  6. Step 6: Final answer
    x = 154.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.