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Finding the Fourth Proportional to 81,103.44, 111,921.64 and 45,294.08

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Solution

The fourth proportional to 81,103.44, 111,921.64 and 45,294.08 is: 62,505.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,103.44 : 111,921.64 = 45,294.08 : x
  2. Step 2: Convert to fraction form
    81,103.44/111,921.64 = 45,294.08/x
  3. Step 3: Cross multiply
    81,103.44x = 111,921.64 × 45,294.08
  4. Step 4: Simplify right side
    81,103.44x = 5,069,387,715.89
  5. Step 5: Solve for x
    x = 5,069,387,715.89/81,103.44
  6. Step 6: Final answer
    x = 62,505.21

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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.