Home / 87,808.20-121,142.70-55,969.80

Finding the Fourth Proportional to 87,808.20, 121,142.70 and 55,969.80

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Solution

The fourth proportional to 87,808.20, 121,142.70 and 55,969.80 is: 77,217.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,808.20 : 121,142.70 = 55,969.80 : x
  2. Step 2: Convert to fraction form
    87,808.20/121,142.70 = 55,969.80/x
  3. Step 3: Cross multiply
    87,808.20x = 121,142.70 × 55,969.80
  4. Step 4: Simplify right side
    87,808.20x = 6,780,332,690.46
  5. Step 5: Solve for x
    x = 6,780,332,690.46/87,808.20
  6. Step 6: Final answer
    x = 77,217.53

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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.