Home / 87,869.12-131,803.20-21,309.12

Finding the Fourth Proportional to 87,869.12, 131,803.20 and 21,309.12

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Solution

The fourth proportional to 87,869.12, 131,803.20 and 21,309.12 is: 31,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,869.12 : 131,803.20 = 21,309.12 : x
  2. Step 2: Convert to fraction form
    87,869.12/131,803.20 = 21,309.12/x
  3. Step 3: Cross multiply
    87,869.12x = 131,803.20 × 21,309.12
  4. Step 4: Simplify right side
    87,869.12x = 2,808,610,205.18
  5. Step 5: Solve for x
    x = 2,808,610,205.18/87,869.12
  6. Step 6: Final answer
    x = 31,963.56

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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.