Home / 84,821.20-127,231.80-40,469.20

Finding the Fourth Proportional to 84,821.20, 127,231.80 and 40,469.20

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Solution

The fourth proportional to 84,821.20, 127,231.80 and 40,469.20 is: 60,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,821.20 : 127,231.80 = 40,469.20 : x
  2. Step 2: Convert to fraction form
    84,821.20/127,231.80 = 40,469.20/x
  3. Step 3: Cross multiply
    84,821.20x = 127,231.80 × 40,469.20
  4. Step 4: Simplify right side
    84,821.20x = 5,148,969,160.56
  5. Step 5: Solve for x
    x = 5,148,969,160.56/84,821.20
  6. Step 6: Final answer
    x = 60,703.80

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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.