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Finding the Fourth Proportional to 172,633.92, 258,843.68 and 72,742.72

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Solution

The fourth proportional to 172,633.92, 258,843.68 and 72,742.72 is: 109,068.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,633.92 : 258,843.68 = 72,742.72 : x
  2. Step 2: Convert to fraction form
    172,633.92/258,843.68 = 72,742.72/x
  3. Step 3: Cross multiply
    172,633.92x = 258,843.68 × 72,742.72
  4. Step 4: Simplify right side
    172,633.92x = 18,828,993,338.01
  5. Step 5: Solve for x
    x = 18,828,993,338.01/172,633.92
  6. Step 6: Final answer
    x = 109,068.91

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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.