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Finding the Fourth Proportional to 423,663.45, 635,494.82 and 108,120.39

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Solution

The fourth proportional to 423,663.45, 635,494.82 and 108,120.39 is: 162,180.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,663.45 : 635,494.82 = 108,120.39 : x
  2. Step 2: Convert to fraction form
    423,663.45/635,494.82 = 108,120.39/x
  3. Step 3: Cross multiply
    423,663.45x = 635,494.82 × 108,120.39
  4. Step 4: Simplify right side
    423,663.45x = 68,709,947,240.78
  5. Step 5: Solve for x
    x = 68,709,947,240.78/423,663.45
  6. Step 6: Final answer
    x = 162,180.49

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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.