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Finding the Fourth Proportional to 87,980.87, 121,410.64 and 52,149.61

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Solution

The fourth proportional to 87,980.87, 121,410.64 and 52,149.61 is: 71,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.87 : 121,410.64 = 52,149.61 : x
  2. Step 2: Convert to fraction form
    87,980.87/121,410.64 = 52,149.61/x
  3. Step 3: Cross multiply
    87,980.87x = 121,410.64 × 52,149.61
  4. Step 4: Simplify right side
    87,980.87x = 6,331,517,091.95
  5. Step 5: Solve for x
    x = 6,331,517,091.95/87,980.87
  6. Step 6: Final answer
    x = 71,964.71

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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.