Home / 71,979.59-99,331.79-40,148.48

Finding the Fourth Proportional to 71,979.59, 99,331.79 and 40,148.48

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Solution

The fourth proportional to 71,979.59, 99,331.79 and 40,148.48 is: 55,404.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,979.59 : 99,331.79 = 40,148.48 : x
  2. Step 2: Convert to fraction form
    71,979.59/99,331.79 = 40,148.48/x
  3. Step 3: Cross multiply
    71,979.59x = 99,331.79 × 40,148.48
  4. Step 4: Simplify right side
    71,979.59x = 3,988,019,686.78
  5. Step 5: Solve for x
    x = 3,988,019,686.78/71,979.59
  6. Step 6: Final answer
    x = 55,404.87

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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.