Home / 129,401.14-178,575.42-72,042.97

Finding the Fourth Proportional to 129,401.14, 178,575.42 and 72,042.97

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Solution

The fourth proportional to 129,401.14, 178,575.42 and 72,042.97 is: 99,420.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,401.14 : 178,575.42 = 72,042.97 : x
  2. Step 2: Convert to fraction form
    129,401.14/178,575.42 = 72,042.97/x
  3. Step 3: Cross multiply
    129,401.14x = 178,575.42 × 72,042.97
  4. Step 4: Simplify right side
    129,401.14x = 12,865,103,625.80
  5. Step 5: Solve for x
    x = 12,865,103,625.80/129,401.14
  6. Step 6: Final answer
    x = 99,420.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.