Home / 129,938.40-194,677.20-80,632.80

Finding the Fourth Proportional to 129,938.40, 194,677.20 and 80,632.80

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Solution

The fourth proportional to 129,938.40, 194,677.20 and 80,632.80 is: 120,806.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,938.40 : 194,677.20 = 80,632.80 : x
  2. Step 2: Convert to fraction form
    129,938.40/194,677.20 = 80,632.80/x
  3. Step 3: Cross multiply
    129,938.40x = 194,677.20 × 80,632.80
  4. Step 4: Simplify right side
    129,938.40x = 15,697,367,732.16
  5. Step 5: Solve for x
    x = 15,697,367,732.16/129,938.40
  6. Step 6: Final answer
    x = 120,806.23

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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.