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Finding the Fourth Proportional to 172,119.83, 258,179.94 and 53,791.79

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Solution

The fourth proportional to 172,119.83, 258,179.94 and 53,791.79 is: 80,687.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,119.83 : 258,179.94 = 53,791.79 : x
  2. Step 2: Convert to fraction form
    172,119.83/258,179.94 = 53,791.79/x
  3. Step 3: Cross multiply
    172,119.83x = 258,179.94 × 53,791.79
  4. Step 4: Simplify right side
    172,119.83x = 13,887,959,823.79
  5. Step 5: Solve for x
    x = 13,887,959,823.79/172,119.83
  6. Step 6: Final answer
    x = 80,687.74

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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.