Home / 80,760.60-121,140.90-51,211.80

Finding the Fourth Proportional to 80,760.60, 121,140.90 and 51,211.80

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Solution

The fourth proportional to 80,760.60, 121,140.90 and 51,211.80 is: 76,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,760.60 : 121,140.90 = 51,211.80 : x
  2. Step 2: Convert to fraction form
    80,760.60/121,140.90 = 51,211.80/x
  3. Step 3: Cross multiply
    80,760.60x = 121,140.90 × 51,211.80
  4. Step 4: Simplify right side
    80,760.60x = 6,203,843,542.62
  5. Step 5: Solve for x
    x = 6,203,843,542.62/80,760.60
  6. Step 6: Final answer
    x = 76,817.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.