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Finding the Fourth Proportional to 84,589.80, 126,793.14 and 55,028.76

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Solution

The fourth proportional to 84,589.80, 126,793.14 and 55,028.76 is: 82,483.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,589.80 : 126,793.14 = 55,028.76 : x
  2. Step 2: Convert to fraction form
    84,589.80/126,793.14 = 55,028.76/x
  3. Step 3: Cross multiply
    84,589.80x = 126,793.14 × 55,028.76
  4. Step 4: Simplify right side
    84,589.80x = 6,977,269,270.71
  5. Step 5: Solve for x
    x = 6,977,269,270.71/84,589.80
  6. Step 6: Final answer
    x = 82,483.58

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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.