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Finding the Fourth Proportional to 81,105.04, 111,921.78 and 45,294.40

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Solution

The fourth proportional to 81,105.04, 111,921.78 and 45,294.40 is: 62,504.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,105.04 : 111,921.78 = 45,294.40 : x
  2. Step 2: Convert to fraction form
    81,105.04/111,921.78 = 45,294.40/x
  3. Step 3: Cross multiply
    81,105.04x = 111,921.78 × 45,294.40
  4. Step 4: Simplify right side
    81,105.04x = 5,069,429,872.03
  5. Step 5: Solve for x
    x = 5,069,429,872.03/81,105.04
  6. Step 6: Final answer
    x = 62,504.50

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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.