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Finding the Fourth Proportional to 257,979.96, 387,119.39 and 108,206.91

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Solution

The fourth proportional to 257,979.96, 387,119.39 and 108,206.91 is: 162,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,979.96 : 387,119.39 = 108,206.91 : x
  2. Step 2: Convert to fraction form
    257,979.96/387,119.39 = 108,206.91/x
  3. Step 3: Cross multiply
    257,979.96x = 387,119.39 × 108,206.91
  4. Step 4: Simplify right side
    257,979.96x = 41,888,992,451.95
  5. Step 5: Solve for x
    x = 41,888,992,451.95/257,979.96
  6. Step 6: Final answer
    x = 162,373.05

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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.