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Finding the Fourth Proportional to 215,906.31, 323,699.49 and 103,479.48

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Solution

The fourth proportional to 215,906.31, 323,699.49 and 103,479.48 is: 155,142.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,906.31 : 323,699.49 = 103,479.48 : x
  2. Step 2: Convert to fraction form
    215,906.31/323,699.49 = 103,479.48/x
  3. Step 3: Cross multiply
    215,906.31x = 323,699.49 × 103,479.48
  4. Step 4: Simplify right side
    215,906.31x = 33,496,254,901.47
  5. Step 5: Solve for x
    x = 33,496,254,901.47/215,906.31
  6. Step 6: Final answer
    x = 155,142.55

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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.