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Finding the Fourth Proportional to 279,655.92, 385,911.89 and 158,781.35

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Solution

The fourth proportional to 279,655.92, 385,911.89 and 158,781.35 is: 219,110.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,655.92 : 385,911.89 = 158,781.35 : x
  2. Step 2: Convert to fraction form
    279,655.92/385,911.89 = 158,781.35/x
  3. Step 3: Cross multiply
    279,655.92x = 385,911.89 × 158,781.35
  4. Step 4: Simplify right side
    279,655.92x = 61,275,608,151.79
  5. Step 5: Solve for x
    x = 61,275,608,151.79/279,655.92
  6. Step 6: Final answer
    x = 219,110.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.