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Finding the Fourth Proportional to 192,707.80, 288,672.90 and 129,722.20

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Solution

The fourth proportional to 192,707.80, 288,672.90 and 129,722.20 is: 194,321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,707.80 : 288,672.90 = 129,722.20 : x
  2. Step 2: Convert to fraction form
    192,707.80/288,672.90 = 129,722.20/x
  3. Step 3: Cross multiply
    192,707.80x = 288,672.90 × 129,722.20
  4. Step 4: Simplify right side
    192,707.80x = 37,447,283,668.38
  5. Step 5: Solve for x
    x = 37,447,283,668.38/192,707.80
  6. Step 6: Final answer
    x = 194,321.58

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1.5x scale

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.