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Finding the Fourth Proportional to 81,065.62, 111,865.90 and 45,257.90

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Solution

The fourth proportional to 81,065.62, 111,865.90 and 45,257.90 is: 62,453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,065.62 : 111,865.90 = 45,257.90 : x
  2. Step 2: Convert to fraction form
    81,065.62/111,865.90 = 45,257.90/x
  3. Step 3: Cross multiply
    81,065.62x = 111,865.90 × 45,257.90
  4. Step 4: Simplify right side
    81,065.62x = 5,062,815,715.61
  5. Step 5: Solve for x
    x = 5,062,815,715.61/81,065.62
  6. Step 6: Final answer
    x = 62,453.30

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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.