Home / 80,720.80-121,081.20-51,196.30

Finding the Fourth Proportional to 80,720.80, 121,081.20 and 51,196.30

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Solution

The fourth proportional to 80,720.80, 121,081.20 and 51,196.30 is: 76,794.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.80 : 121,081.20 = 51,196.30 : x
  2. Step 2: Convert to fraction form
    80,720.80/121,081.20 = 51,196.30/x
  3. Step 3: Cross multiply
    80,720.80x = 121,081.20 × 51,196.30
  4. Step 4: Simplify right side
    80,720.80x = 6,198,909,439.56
  5. Step 5: Solve for x
    x = 6,198,909,439.56/80,720.80
  6. Step 6: Final answer
    x = 76,794.45

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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.