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Finding the Fourth Proportional to 112.60, 154.96 and 102.25

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Solution

The fourth proportional to 112.60, 154.96 and 102.25 is: 140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.60 : 154.96 = 102.25 : x
  2. Step 2: Convert to fraction form
    112.60/154.96 = 102.25/x
  3. Step 3: Cross multiply
    112.60x = 154.96 × 102.25
  4. Step 4: Simplify right side
    112.60x = 15,844.66
  5. Step 5: Solve for x
    x = 15,844.66/112.60
  6. Step 6: Final answer
    x = 140.72

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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.