Home / 81,586.49-122,379.72-25,431.12

Finding the Fourth Proportional to 81,586.49, 122,379.72 and 25,431.12

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Solution

The fourth proportional to 81,586.49, 122,379.72 and 25,431.12 is: 38,146.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,586.49 : 122,379.72 = 25,431.12 : x
  2. Step 2: Convert to fraction form
    81,586.49/122,379.72 = 25,431.12/x
  3. Step 3: Cross multiply
    81,586.49x = 122,379.72 × 25,431.12
  4. Step 4: Simplify right side
    81,586.49x = 3,112,253,344.89
  5. Step 5: Solve for x
    x = 3,112,253,344.89/81,586.49
  6. Step 6: Final answer
    x = 38,146.68

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Similar ratio
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1.5x scale

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.