Home / 87,920.70-131,504.25-81,539.11

Finding the Fourth Proportional to 87,920.70, 131,504.25 and 81,539.11

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Solution

The fourth proportional to 87,920.70, 131,504.25 and 81,539.11 is: 121,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.70 : 131,504.25 = 81,539.11 : x
  2. Step 2: Convert to fraction form
    87,920.70/131,504.25 = 81,539.11/x
  3. Step 3: Cross multiply
    87,920.70x = 131,504.25 × 81,539.11
  4. Step 4: Simplify right side
    87,920.70x = 10,722,739,506.22
  5. Step 5: Solve for x
    x = 10,722,739,506.22/87,920.70
  6. Step 6: Final answer
    x = 121,959.21

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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.