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Finding the Fourth Proportional to 423,672.75, 635,508.54 and 108,129.65

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Solution

The fourth proportional to 423,672.75, 635,508.54 and 108,129.65 is: 162,194.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,672.75 : 635,508.54 = 108,129.65 : x
  2. Step 2: Convert to fraction form
    423,672.75/635,508.54 = 108,129.65/x
  3. Step 3: Cross multiply
    423,672.75x = 635,508.54 × 108,129.65
  4. Step 4: Simplify right side
    423,672.75x = 68,717,312,824.67
  5. Step 5: Solve for x
    x = 68,717,312,824.67/423,672.75
  6. Step 6: Final answer
    x = 162,194.32

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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.