Home / 80,939.20-111,682.56-45,121.36

Finding the Fourth Proportional to 80,939.20, 111,682.56 and 45,121.36

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Solution

The fourth proportional to 80,939.20, 111,682.56 and 45,121.36 is: 62,259.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,939.20 : 111,682.56 = 45,121.36 : x
  2. Step 2: Convert to fraction form
    80,939.20/111,682.56 = 45,121.36/x
  3. Step 3: Cross multiply
    80,939.20x = 111,682.56 × 45,121.36
  4. Step 4: Simplify right side
    80,939.20x = 5,039,268,995.48
  5. Step 5: Solve for x
    x = 5,039,268,995.48/80,939.20
  6. Step 6: Final answer
    x = 62,259.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.