Home / 431,623.40-647,411.22-132,103.76

Finding the Fourth Proportional to 431,623.40, 647,411.22 and 132,103.76

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Solution

The fourth proportional to 431,623.40, 647,411.22 and 132,103.76 is: 198,148.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,623.40 : 647,411.22 = 132,103.76 : x
  2. Step 2: Convert to fraction form
    431,623.40/647,411.22 = 132,103.76/x
  3. Step 3: Cross multiply
    431,623.40x = 647,411.22 × 132,103.76
  4. Step 4: Simplify right side
    431,623.40x = 85,525,456,428.19
  5. Step 5: Solve for x
    x = 85,525,456,428.19/431,623.40
  6. Step 6: Final answer
    x = 198,148.33

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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.