Home / 81,687.20-122,473.14-31,725.68

Finding the Fourth Proportional to 81,687.20, 122,473.14 and 31,725.68

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Solution

The fourth proportional to 81,687.20, 122,473.14 and 31,725.68 is: 47,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,687.20 : 122,473.14 = 31,725.68 : x
  2. Step 2: Convert to fraction form
    81,687.20/122,473.14 = 31,725.68/x
  3. Step 3: Cross multiply
    81,687.20x = 122,473.14 × 31,725.68
  4. Step 4: Simplify right side
    81,687.20x = 3,885,543,648.24
  5. Step 5: Solve for x
    x = 3,885,543,648.24/81,687.20
  6. Step 6: Final answer
    x = 47,566.13

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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.