Home / 87,785.57-121,143.70-47,500.05

Finding the Fourth Proportional to 87,785.57, 121,143.70 and 47,500.05

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Solution

The fourth proportional to 87,785.57, 121,143.70 and 47,500.05 is: 65,549.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,785.57 : 121,143.70 = 47,500.05 : x
  2. Step 2: Convert to fraction form
    87,785.57/121,143.70 = 47,500.05/x
  3. Step 3: Cross multiply
    87,785.57x = 121,143.70 × 47,500.05
  4. Step 4: Simplify right side
    87,785.57x = 5,754,331,298.70
  5. Step 5: Solve for x
    x = 5,754,331,298.70/87,785.57
  6. Step 6: Final answer
    x = 65,549.85

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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.