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Finding the Fourth Proportional to 426,009.70, 639,105.27 and 126,491.14

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Solution

The fourth proportional to 426,009.70, 639,105.27 and 126,491.14 is: 189,763.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,009.70 : 639,105.27 = 126,491.14 : x
  2. Step 2: Convert to fraction form
    426,009.70/639,105.27 = 126,491.14/x
  3. Step 3: Cross multiply
    426,009.70x = 639,105.27 × 126,491.14
  4. Step 4: Simplify right side
    426,009.70x = 80,841,154,182.31
  5. Step 5: Solve for x
    x = 80,841,154,182.31/426,009.70
  6. Step 6: Final answer
    x = 189,763.65

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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.