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Finding the Fourth Proportional to 426,193.65, 639,390.51 and 126,676.71

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Solution

The fourth proportional to 426,193.65, 639,390.51 and 126,676.71 is: 190,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,193.65 : 639,390.51 = 126,676.71 : x
  2. Step 2: Convert to fraction form
    426,193.65/639,390.51 = 126,676.71/x
  3. Step 3: Cross multiply
    426,193.65x = 639,390.51 × 126,676.71
  4. Step 4: Simplify right side
    426,193.65x = 80,995,886,212.02
  5. Step 5: Solve for x
    x = 80,995,886,212.02/426,193.65
  6. Step 6: Final answer
    x = 190,044.80

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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.