Home / 87,471.28-120,689.76-64,862.56

Finding the Fourth Proportional to 87,471.28, 120,689.76 and 64,862.56

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Solution

The fourth proportional to 87,471.28, 120,689.76 and 64,862.56 is: 89,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,471.28 : 120,689.76 = 64,862.56 : x
  2. Step 2: Convert to fraction form
    87,471.28/120,689.76 = 64,862.56/x
  3. Step 3: Cross multiply
    87,471.28x = 120,689.76 × 64,862.56
  4. Step 4: Simplify right side
    87,471.28x = 7,828,246,799.39
  5. Step 5: Solve for x
    x = 7,828,246,799.39/87,471.28
  6. Step 6: Final answer
    x = 89,495.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.