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Finding the Fourth Proportional to 112.62, 154.59 and 101.69

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Solution

The fourth proportional to 112.62, 154.59 and 101.69 is: 139.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.62 : 154.59 = 101.69 : x
  2. Step 2: Convert to fraction form
    112.62/154.59 = 101.69/x
  3. Step 3: Cross multiply
    112.62x = 154.59 × 101.69
  4. Step 4: Simplify right side
    112.62x = 15,719.48
  5. Step 5: Solve for x
    x = 15,719.48/112.62
  6. Step 6: Final answer
    x = 139.58

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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.