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Finding the Fourth Proportional to 80,201.72, 110,431.34 and 71,233.65

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Solution

The fourth proportional to 80,201.72, 110,431.34 and 71,233.65 is: 98,083.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,201.72 : 110,431.34 = 71,233.65 : x
  2. Step 2: Convert to fraction form
    80,201.72/110,431.34 = 71,233.65/x
  3. Step 3: Cross multiply
    80,201.72x = 110,431.34 × 71,233.65
  4. Step 4: Simplify right side
    80,201.72x = 7,866,427,422.59
  5. Step 5: Solve for x
    x = 7,866,427,422.59/80,201.72
  6. Step 6: Final answer
    x = 98,083.03

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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.