Home / 126,031.20-173,890.80-78,280.80

Finding the Fourth Proportional to 126,031.20, 173,890.80 and 78,280.80

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Solution

The fourth proportional to 126,031.20, 173,890.80 and 78,280.80 is: 108,007.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,031.20 : 173,890.80 = 78,280.80 : x
  2. Step 2: Convert to fraction form
    126,031.20/173,890.80 = 78,280.80/x
  3. Step 3: Cross multiply
    126,031.20x = 173,890.80 × 78,280.80
  4. Step 4: Simplify right side
    126,031.20x = 13,612,310,936.64
  5. Step 5: Solve for x
    x = 13,612,310,936.64/126,031.20
  6. Step 6: Final answer
    x = 108,007.47

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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.