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Finding the Fourth Proportional to 112.38, 154.68 and 112.14

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Solution

The fourth proportional to 112.38, 154.68 and 112.14 is: 154.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.38 : 154.68 = 112.14 : x
  2. Step 2: Convert to fraction form
    112.38/154.68 = 112.14/x
  3. Step 3: Cross multiply
    112.38x = 154.68 × 112.14
  4. Step 4: Simplify right side
    112.38x = 17,345.82
  5. Step 5: Solve for x
    x = 17,345.82/112.38
  6. Step 6: Final answer
    x = 154.35

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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.