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Finding the Fourth Proportional to 81,010.97, 111,800.52 and 45,201.78

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Solution

The fourth proportional to 81,010.97, 111,800.52 and 45,201.78 is: 62,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,010.97 : 111,800.52 = 45,201.78 : x
  2. Step 2: Convert to fraction form
    81,010.97/111,800.52 = 45,201.78/x
  3. Step 3: Cross multiply
    81,010.97x = 111,800.52 × 45,201.78
  4. Step 4: Simplify right side
    81,010.97x = 5,053,582,508.93
  5. Step 5: Solve for x
    x = 5,053,582,508.93/81,010.97
  6. Step 6: Final answer
    x = 62,381.46

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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.