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Finding the Fourth Proportional to 125.85, 187.77 and 112.17

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Solution

The fourth proportional to 125.85, 187.77 and 112.17 is: 167.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.85 : 187.77 = 112.17 : x
  2. Step 2: Convert to fraction form
    125.85/187.77 = 112.17/x
  3. Step 3: Cross multiply
    125.85x = 187.77 × 112.17
  4. Step 4: Simplify right side
    125.85x = 21,062.16
  5. Step 5: Solve for x
    x = 21,062.16/125.85
  6. Step 6: Final answer
    x = 167.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.