Home / 80,901.28-121,406.55-28,311.22

Finding the Fourth Proportional to 80,901.28, 121,406.55 and 28,311.22

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Solution

The fourth proportional to 80,901.28, 121,406.55 and 28,311.22 is: 42,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.28 : 121,406.55 = 28,311.22 : x
  2. Step 2: Convert to fraction form
    80,901.28/121,406.55 = 28,311.22/x
  3. Step 3: Cross multiply
    80,901.28x = 121,406.55 × 28,311.22
  4. Step 4: Simplify right side
    80,901.28x = 3,437,167,546.49
  5. Step 5: Solve for x
    x = 3,437,167,546.49/80,901.28
  6. Step 6: Final answer
    x = 42,485.95

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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.