Home / 80,816.20-121,202.70-28,220.20

Finding the Fourth Proportional to 80,816.20, 121,202.70 and 28,220.20

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Solution

The fourth proportional to 80,816.20, 121,202.70 and 28,220.20 is: 42,322.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,816.20 : 121,202.70 = 28,220.20 : x
  2. Step 2: Convert to fraction form
    80,816.20/121,202.70 = 28,220.20/x
  3. Step 3: Cross multiply
    80,816.20x = 121,202.70 × 28,220.20
  4. Step 4: Simplify right side
    80,816.20x = 3,420,364,434.54
  5. Step 5: Solve for x
    x = 3,420,364,434.54/80,816.20
  6. Step 6: Final answer
    x = 42,322.76

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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.