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Finding the Fourth Proportional to 81,278.70, 112,164.76 and 45,469.30

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Solution

The fourth proportional to 81,278.70, 112,164.76 and 45,469.30 is: 62,747.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.70 : 112,164.76 = 45,469.30 : x
  2. Step 2: Convert to fraction form
    81,278.70/112,164.76 = 45,469.30/x
  3. Step 3: Cross multiply
    81,278.70x = 112,164.76 × 45,469.30
  4. Step 4: Simplify right side
    81,278.70x = 5,100,053,713.00
  5. Step 5: Solve for x
    x = 5,100,053,713.00/81,278.70
  6. Step 6: Final answer
    x = 62,747.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.