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Finding the Fourth Proportional to 259,673.40, 389,519.82 and 72,680.04

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Solution

The fourth proportional to 259,673.40, 389,519.82 and 72,680.04 is: 109,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,673.40 : 389,519.82 = 72,680.04 : x
  2. Step 2: Convert to fraction form
    259,673.40/389,519.82 = 72,680.04/x
  3. Step 3: Cross multiply
    259,673.40x = 389,519.82 × 72,680.04
  4. Step 4: Simplify right side
    259,673.40x = 28,310,316,098.39
  5. Step 5: Solve for x
    x = 28,310,316,098.39/259,673.40
  6. Step 6: Final answer
    x = 109,022.78

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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.