Home / 426,377.08-639,454.20-126,777

Finding the Fourth Proportional to 426,377.08, 639,454.20 and 126,777

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Solution

The fourth proportional to 426,377.08, 639,454.20 and 126,777 is: 190,132.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,377.08 : 639,454.20 = 126,777 : x
  2. Step 2: Convert to fraction form
    426,377.08/639,454.20 = 126,777/x
  3. Step 3: Cross multiply
    426,377.08x = 639,454.20 × 126,777
  4. Step 4: Simplify right side
    426,377.08x = 81,068,085,113.40
  5. Step 5: Solve for x
    x = 81,068,085,113.40/426,377.08
  6. Step 6: Final answer
    x = 190,132.37

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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.