Home / 120,839.20-181,258.80-54,311.20

Finding the Fourth Proportional to 120,839.20, 181,258.80 and 54,311.20

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Solution

The fourth proportional to 120,839.20, 181,258.80 and 54,311.20 is: 81,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,839.20 : 181,258.80 = 54,311.20 : x
  2. Step 2: Convert to fraction form
    120,839.20/181,258.80 = 54,311.20/x
  3. Step 3: Cross multiply
    120,839.20x = 181,258.80 × 54,311.20
  4. Step 4: Simplify right side
    120,839.20x = 9,844,382,938.56
  5. Step 5: Solve for x
    x = 9,844,382,938.56/120,839.20
  6. Step 6: Final answer
    x = 81,466.80

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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.