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Finding the Fourth Proportional to 125.67, 188.60 and 80.13

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Solution

The fourth proportional to 125.67, 188.60 and 80.13 is: 120.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.67 : 188.60 = 80.13 : x
  2. Step 2: Convert to fraction form
    125.67/188.60 = 80.13/x
  3. Step 3: Cross multiply
    125.67x = 188.60 × 80.13
  4. Step 4: Simplify right side
    125.67x = 15,112.52
  5. Step 5: Solve for x
    x = 15,112.52/125.67
  6. Step 6: Final answer
    x = 120.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.