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Finding the Fourth Proportional to 125.19, 171.96 and 101.79

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Solution

The fourth proportional to 125.19, 171.96 and 101.79 is: 139.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.19 : 171.96 = 101.79 : x
  2. Step 2: Convert to fraction form
    125.19/171.96 = 101.79/x
  3. Step 3: Cross multiply
    125.19x = 171.96 × 101.79
  4. Step 4: Simplify right side
    125.19x = 17,503.81
  5. Step 5: Solve for x
    x = 17,503.81/125.19
  6. Step 6: Final answer
    x = 139.82

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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.