Home / 71,979.46-99,331.76-40,150.40

Finding the Fourth Proportional to 71,979.46, 99,331.76 and 40,150.40

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Solution

The fourth proportional to 71,979.46, 99,331.76 and 40,150.40 is: 55,407.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,979.46 : 99,331.76 = 40,150.40 : x
  2. Step 2: Convert to fraction form
    71,979.46/99,331.76 = 40,150.40/x
  3. Step 3: Cross multiply
    71,979.46x = 99,331.76 × 40,150.40
  4. Step 4: Simplify right side
    71,979.46x = 3,988,209,500.42
  5. Step 5: Solve for x
    x = 3,988,209,500.42/71,979.46
  6. Step 6: Final answer
    x = 55,407.61

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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.