Home / 257,979.16-386,819.28-100,022.68

Finding the Fourth Proportional to 257,979.16, 386,819.28 and 100,022.68

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Solution

The fourth proportional to 257,979.16, 386,819.28 and 100,022.68 is: 149,976.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,979.16 : 386,819.28 = 100,022.68 : x
  2. Step 2: Convert to fraction form
    257,979.16/386,819.28 = 100,022.68/x
  3. Step 3: Cross multiply
    257,979.16x = 386,819.28 × 100,022.68
  4. Step 4: Simplify right side
    257,979.16x = 38,690,701,061.27
  5. Step 5: Solve for x
    x = 38,690,701,061.27/257,979.16
  6. Step 6: Final answer
    x = 149,976.07

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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.