Home / 87,920.13-131,880.35-21,360.31

Finding the Fourth Proportional to 87,920.13, 131,880.35 and 21,360.31

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Solution

The fourth proportional to 87,920.13, 131,880.35 and 21,360.31 is: 32,040.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.13 : 131,880.35 = 21,360.31 : x
  2. Step 2: Convert to fraction form
    87,920.13/131,880.35 = 21,360.31/x
  3. Step 3: Cross multiply
    87,920.13x = 131,880.35 × 21,360.31
  4. Step 4: Simplify right side
    87,920.13x = 2,817,004,882.61
  5. Step 5: Solve for x
    x = 2,817,004,882.61/87,920.13
  6. Step 6: Final answer
    x = 32,040.50

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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.