Home / 426,130.32-639,138.72-126,605.28

Finding the Fourth Proportional to 426,130.32, 639,138.72 and 126,605.28

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Solution

The fourth proportional to 426,130.32, 639,138.72 and 126,605.28 is: 189,891.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,130.32 : 639,138.72 = 126,605.28 : x
  2. Step 2: Convert to fraction form
    426,130.32/639,138.72 = 126,605.28/x
  3. Step 3: Cross multiply
    426,130.32x = 639,138.72 × 126,605.28
  4. Step 4: Simplify right side
    426,130.32x = 80,918,336,604.44
  5. Step 5: Solve for x
    x = 80,918,336,604.44/426,130.32
  6. Step 6: Final answer
    x = 189,891.06

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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.