Home / 87,847.20-121,433.43-78,380.91

Finding the Fourth Proportional to 87,847.20, 121,433.43 and 78,380.91

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Solution

The fourth proportional to 87,847.20, 121,433.43 and 78,380.91 is: 108,347.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,847.20 : 121,433.43 = 78,380.91 : x
  2. Step 2: Convert to fraction form
    87,847.20/121,433.43 = 78,380.91/x
  3. Step 3: Cross multiply
    87,847.20x = 121,433.43 × 78,380.91
  4. Step 4: Simplify right side
    87,847.20x = 9,518,062,259.33
  5. Step 5: Solve for x
    x = 9,518,062,259.33/87,847.20
  6. Step 6: Final answer
    x = 108,347.93

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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.