Home / 431,639.20-647,532.78-132,112.36

Finding the Fourth Proportional to 431,639.20, 647,532.78 and 132,112.36

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Solution

The fourth proportional to 431,639.20, 647,532.78 and 132,112.36 is: 198,191.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,639.20 : 647,532.78 = 132,112.36 : x
  2. Step 2: Convert to fraction form
    431,639.20/647,532.78 = 132,112.36/x
  3. Step 3: Cross multiply
    431,639.20x = 647,532.78 × 132,112.36
  4. Step 4: Simplify right side
    431,639.20x = 85,547,083,743.16
  5. Step 5: Solve for x
    x = 85,547,083,743.16/431,639.20
  6. Step 6: Final answer
    x = 198,191.18

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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.