Home / 80,901.26-121,406.56-28,311.20

Finding the Fourth Proportional to 80,901.26, 121,406.56 and 28,311.20

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Solution

The fourth proportional to 80,901.26, 121,406.56 and 28,311.20 is: 42,485.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.26 : 121,406.56 = 28,311.20 : x
  2. Step 2: Convert to fraction form
    80,901.26/121,406.56 = 28,311.20/x
  3. Step 3: Cross multiply
    80,901.26x = 121,406.56 × 28,311.20
  4. Step 4: Simplify right side
    80,901.26x = 3,437,165,401.47
  5. Step 5: Solve for x
    x = 3,437,165,401.47/80,901.26
  6. Step 6: Final answer
    x = 42,485.93

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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.