Home / 80,423.10-120,634.65-79,904.70

Finding the Fourth Proportional to 80,423.10, 120,634.65 and 79,904.70

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Solution

The fourth proportional to 80,423.10, 120,634.65 and 79,904.70 is: 119,857.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,423.10 : 120,634.65 = 79,904.70 : x
  2. Step 2: Convert to fraction form
    80,423.10/120,634.65 = 79,904.70/x
  3. Step 3: Cross multiply
    80,423.10x = 120,634.65 × 79,904.70
  4. Step 4: Simplify right side
    80,423.10x = 9,639,275,517.86
  5. Step 5: Solve for x
    x = 9,639,275,517.86/80,423.10
  6. Step 6: Final answer
    x = 119,857.05

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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.