Home / 83,839.20-125,715.60-31,221.60

Finding the Fourth Proportional to 83,839.20, 125,715.60 and 31,221.60

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Solution

The fourth proportional to 83,839.20, 125,715.60 and 31,221.60 is: 46,816.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,839.20 : 125,715.60 = 31,221.60 : x
  2. Step 2: Convert to fraction form
    83,839.20/125,715.60 = 31,221.60/x
  3. Step 3: Cross multiply
    83,839.20x = 125,715.60 × 31,221.60
  4. Step 4: Simplify right side
    83,839.20x = 3,925,042,176.96
  5. Step 5: Solve for x
    x = 3,925,042,176.96/83,839.20
  6. Step 6: Final answer
    x = 46,816.31

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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.