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Finding the Fourth Proportional to 80,647.56, 120,617.64 and 71,825.13

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Solution

The fourth proportional to 80,647.56, 120,617.64 and 71,825.13 is: 107,422.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,647.56 : 120,617.64 = 71,825.13 : x
  2. Step 2: Convert to fraction form
    80,647.56/120,617.64 = 71,825.13/x
  3. Step 3: Cross multiply
    80,647.56x = 120,617.64 × 71,825.13
  4. Step 4: Simplify right side
    80,647.56x = 8,663,377,673.29
  5. Step 5: Solve for x
    x = 8,663,377,673.29/80,647.56
  6. Step 6: Final answer
    x = 107,422.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.