Home / 138,653.13-207,979.70-45,158.88

Finding the Fourth Proportional to 138,653.13, 207,979.70 and 45,158.88

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Solution

The fourth proportional to 138,653.13, 207,979.70 and 45,158.88 is: 67,738.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,653.13 : 207,979.70 = 45,158.88 : x
  2. Step 2: Convert to fraction form
    138,653.13/207,979.70 = 45,158.88/x
  3. Step 3: Cross multiply
    138,653.13x = 207,979.70 × 45,158.88
  4. Step 4: Simplify right side
    138,653.13x = 9,392,131,122.88
  5. Step 5: Solve for x
    x = 9,392,131,122.88/138,653.13
  6. Step 6: Final answer
    x = 67,738.33

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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.