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Finding the Fourth Proportional to 129,229.80, 193,851.10 and 67,021.80

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Solution

The fourth proportional to 129,229.80, 193,851.10 and 67,021.80 is: 100,536.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,229.80 : 193,851.10 = 67,021.80 : x
  2. Step 2: Convert to fraction form
    129,229.80/193,851.10 = 67,021.80/x
  3. Step 3: Cross multiply
    129,229.80x = 193,851.10 × 67,021.80
  4. Step 4: Simplify right side
    129,229.80x = 12,992,249,653.98
  5. Step 5: Solve for x
    x = 12,992,249,653.98/129,229.80
  6. Step 6: Final answer
    x = 100,536.02

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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.