Home / 85,387.78-127,819.23-72,790.66

Finding the Fourth Proportional to 85,387.78, 127,819.23 and 72,790.66

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Solution

The fourth proportional to 85,387.78, 127,819.23 and 72,790.66 is: 108,962.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,387.78 : 127,819.23 = 72,790.66 : x
  2. Step 2: Convert to fraction form
    85,387.78/127,819.23 = 72,790.66/x
  3. Step 3: Cross multiply
    85,387.78x = 127,819.23 × 72,790.66
  4. Step 4: Simplify right side
    85,387.78x = 9,304,046,112.39
  5. Step 5: Solve for x
    x = 9,304,046,112.39/85,387.78
  6. Step 6: Final answer
    x = 108,962.27

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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.