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Finding the Fourth Proportional to 125.71, 187.55 and 112.03

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Solution

The fourth proportional to 125.71, 187.55 and 112.03 is: 167.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.71 : 187.55 = 112.03 : x
  2. Step 2: Convert to fraction form
    125.71/187.55 = 112.03/x
  3. Step 3: Cross multiply
    125.71x = 187.55 × 112.03
  4. Step 4: Simplify right side
    125.71x = 21,011.23
  5. Step 5: Solve for x
    x = 21,011.23/125.71
  6. Step 6: Final answer
    x = 167.14

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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.