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Finding the Fourth Proportional to 83,220.40, 124,908.90 and 43,805.80

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Solution

The fourth proportional to 83,220.40, 124,908.90 and 43,805.80 is: 65,749.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,220.40 : 124,908.90 = 43,805.80 : x
  2. Step 2: Convert to fraction form
    83,220.40/124,908.90 = 43,805.80/x
  3. Step 3: Cross multiply
    83,220.40x = 124,908.90 × 43,805.80
  4. Step 4: Simplify right side
    83,220.40x = 5,471,734,291.62
  5. Step 5: Solve for x
    x = 5,471,734,291.62/83,220.40
  6. Step 6: Final answer
    x = 65,749.92

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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.