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Finding the Fourth Proportional to 81,104.25, 111,922.65 and 45,294.78

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Solution

The fourth proportional to 81,104.25, 111,922.65 and 45,294.78 is: 62,506.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.25 : 111,922.65 = 45,294.78 : x
  2. Step 2: Convert to fraction form
    81,104.25/111,922.65 = 45,294.78/x
  3. Step 3: Cross multiply
    81,104.25x = 111,922.65 × 45,294.78
  4. Step 4: Simplify right side
    81,104.25x = 5,069,511,808.77
  5. Step 5: Solve for x
    x = 5,069,511,808.77/81,104.25
  6. Step 6: Final answer
    x = 62,506.12

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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.