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Finding the Fourth Proportional to 87,292.80, 120,479.76 and 51,480.72

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Solution

The fourth proportional to 87,292.80, 120,479.76 and 51,480.72 is: 71,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,292.80 : 120,479.76 = 51,480.72 : x
  2. Step 2: Convert to fraction form
    87,292.80/120,479.76 = 51,480.72/x
  3. Step 3: Cross multiply
    87,292.80x = 120,479.76 × 51,480.72
  4. Step 4: Simplify right side
    87,292.80x = 6,202,384,790.23
  5. Step 5: Solve for x
    x = 6,202,384,790.23/87,292.80
  6. Step 6: Final answer
    x = 71,052.65

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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.