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Finding the Fourth Proportional to 423,519.96, 635,145 and 139,144.48

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Solution

The fourth proportional to 423,519.96, 635,145 and 139,144.48 is: 208,672.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,519.96 : 635,145 = 139,144.48 : x
  2. Step 2: Convert to fraction form
    423,519.96/635,145 = 139,144.48/x
  3. Step 3: Cross multiply
    423,519.96x = 635,145 × 139,144.48
  4. Step 4: Simplify right side
    423,519.96x = 88,376,920,749.60
  5. Step 5: Solve for x
    x = 88,376,920,749.60/423,519.96
  6. Step 6: Final answer
    x = 208,672.39

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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.