Home / 426,103.36-638,932.48-126,542.72

Finding the Fourth Proportional to 426,103.36, 638,932.48 and 126,542.72

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Solution

The fourth proportional to 426,103.36, 638,932.48 and 126,542.72 is: 189,747.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,103.36 : 638,932.48 = 126,542.72 : x
  2. Step 2: Convert to fraction form
    426,103.36/638,932.48 = 126,542.72/x
  3. Step 3: Cross multiply
    426,103.36x = 638,932.48 × 126,542.72
  4. Step 4: Simplify right side
    426,103.36x = 80,852,253,915.55
  5. Step 5: Solve for x
    x = 80,852,253,915.55/426,103.36
  6. Step 6: Final answer
    x = 189,747.98

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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.