Home / 80,760.10-121,140.15-51,211.30

Finding the Fourth Proportional to 80,760.10, 121,140.15 and 51,211.30

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Solution

The fourth proportional to 80,760.10, 121,140.15 and 51,211.30 is: 76,816.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,760.10 : 121,140.15 = 51,211.30 : x
  2. Step 2: Convert to fraction form
    80,760.10/121,140.15 = 51,211.30/x
  3. Step 3: Cross multiply
    80,760.10x = 121,140.15 × 51,211.30
  4. Step 4: Simplify right side
    80,760.10x = 6,203,744,563.70
  5. Step 5: Solve for x
    x = 6,203,744,563.70/80,760.10
  6. Step 6: Final answer
    x = 76,816.95

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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.