Home / 87,809.20-121,144.08-55,970.80

Finding the Fourth Proportional to 87,809.20, 121,144.08 and 55,970.80

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Solution

The fourth proportional to 87,809.20, 121,144.08 and 55,970.80 is: 77,218.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,809.20 : 121,144.08 = 55,970.80 : x
  2. Step 2: Convert to fraction form
    87,809.20/121,144.08 = 55,970.80/x
  3. Step 3: Cross multiply
    87,809.20x = 121,144.08 × 55,970.80
  4. Step 4: Simplify right side
    87,809.20x = 6,780,531,072.86
  5. Step 5: Solve for x
    x = 6,780,531,072.86/87,809.20
  6. Step 6: Final answer
    x = 77,218.91

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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.