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Finding the Fourth Proportional to 259,882.75, 389,979.65 and 112,138.75

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Solution

The fourth proportional to 259,882.75, 389,979.65 and 112,138.75 is: 168,275.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,882.75 : 389,979.65 = 112,138.75 : x
  2. Step 2: Convert to fraction form
    259,882.75/389,979.65 = 112,138.75/x
  3. Step 3: Cross multiply
    259,882.75x = 389,979.65 × 112,138.75
  4. Step 4: Simplify right side
    259,882.75x = 43,731,830,476.44
  5. Step 5: Solve for x
    x = 43,731,830,476.44/259,882.75
  6. Step 6: Final answer
    x = 168,275.23

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1.5x scale

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.