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Finding the Fourth Proportional to 81,027.57, 111,818.13 and 45,217.57

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Solution

The fourth proportional to 81,027.57, 111,818.13 and 45,217.57 is: 62,400.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,027.57 : 111,818.13 = 45,217.57 : x
  2. Step 2: Convert to fraction form
    81,027.57/111,818.13 = 45,217.57/x
  3. Step 3: Cross multiply
    81,027.57x = 111,818.13 × 45,217.57
  4. Step 4: Simplify right side
    81,027.57x = 5,056,144,120.54
  5. Step 5: Solve for x
    x = 5,056,144,120.54/81,027.57
  6. Step 6: Final answer
    x = 62,400.29

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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.