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Finding the Fourth Proportional to 172,558.77, 258,620.06 and 77,687.92

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Solution

The fourth proportional to 172,558.77, 258,620.06 and 77,687.92 is: 116,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,558.77 : 258,620.06 = 77,687.92 : x
  2. Step 2: Convert to fraction form
    172,558.77/258,620.06 = 77,687.92/x
  3. Step 3: Cross multiply
    172,558.77x = 258,620.06 × 77,687.92
  4. Step 4: Simplify right side
    172,558.77x = 20,091,654,531.68
  5. Step 5: Solve for x
    x = 20,091,654,531.68/172,558.77
  6. Step 6: Final answer
    x = 116,433.69

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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.