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Finding the Fourth Proportional to 259,367.71, 389,143.08 and 90,934.96

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Solution

The fourth proportional to 259,367.71, 389,143.08 and 90,934.96 is: 136,434.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,367.71 : 389,143.08 = 90,934.96 : x
  2. Step 2: Convert to fraction form
    259,367.71/389,143.08 = 90,934.96/x
  3. Step 3: Cross multiply
    259,367.71x = 389,143.08 × 90,934.96
  4. Step 4: Simplify right side
    259,367.71x = 35,386,710,414.08
  5. Step 5: Solve for x
    x = 35,386,710,414.08/259,367.71
  6. Step 6: Final answer
    x = 136,434.53

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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.