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Finding the Fourth Proportional to 172,679.68, 258,953.90 and 82,629.95

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Solution

The fourth proportional to 172,679.68, 258,953.90 and 82,629.95 is: 123,913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,679.68 : 258,953.90 = 82,629.95 : x
  2. Step 2: Convert to fraction form
    172,679.68/258,953.90 = 82,629.95/x
  3. Step 3: Cross multiply
    172,679.68x = 258,953.90 × 82,629.95
  4. Step 4: Simplify right side
    172,679.68x = 21,397,347,809.31
  5. Step 5: Solve for x
    x = 21,397,347,809.31/172,679.68
  6. Step 6: Final answer
    x = 123,913.53

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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.