Home / 87,117.16-120,177.37-56,920.16

Finding the Fourth Proportional to 87,117.16, 120,177.37 and 56,920.16

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Solution

The fourth proportional to 87,117.16, 120,177.37 and 56,920.16 is: 78,520.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,117.16 : 120,177.37 = 56,920.16 : x
  2. Step 2: Convert to fraction form
    87,117.16/120,177.37 = 56,920.16/x
  3. Step 3: Cross multiply
    87,117.16x = 120,177.37 × 56,920.16
  4. Step 4: Simplify right side
    87,117.16x = 6,840,515,128.78
  5. Step 5: Solve for x
    x = 6,840,515,128.78/87,117.16
  6. Step 6: Final answer
    x = 78,520.87

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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.