Home / 80,916.56-111,712.69-71,939.21

Finding the Fourth Proportional to 80,916.56, 111,712.69 and 71,939.21

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Solution

The fourth proportional to 80,916.56, 111,712.69 and 71,939.21 is: 99,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,916.56 : 111,712.69 = 71,939.21 : x
  2. Step 2: Convert to fraction form
    80,916.56/111,712.69 = 71,939.21/x
  3. Step 3: Cross multiply
    80,916.56x = 111,712.69 × 71,939.21
  4. Step 4: Simplify right side
    80,916.56x = 8,036,522,665.57
  5. Step 5: Solve for x
    x = 8,036,522,665.57/80,916.56
  6. Step 6: Final answer
    x = 99,318.64

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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.