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Finding the Fourth Proportional to 91.67, 125.73 and 80.73

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Solution

The fourth proportional to 91.67, 125.73 and 80.73 is: 110.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.67 : 125.73 = 80.73 : x
  2. Step 2: Convert to fraction form
    91.67/125.73 = 80.73/x
  3. Step 3: Cross multiply
    91.67x = 125.73 × 80.73
  4. Step 4: Simplify right side
    91.67x = 10,150.18
  5. Step 5: Solve for x
    x = 10,150.18/91.67
  6. Step 6: Final answer
    x = 110.73

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Find fourth proportional to 45.83, 62.87 and 40.37
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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.