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Finding the Fourth Proportional to 172,300.91, 258,451.29 and 53,981.44

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Solution

The fourth proportional to 172,300.91, 258,451.29 and 53,981.44 is: 80,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,300.91 : 258,451.29 = 53,981.44 : x
  2. Step 2: Convert to fraction form
    172,300.91/258,451.29 = 53,981.44/x
  3. Step 3: Cross multiply
    172,300.91x = 258,451.29 × 53,981.44
  4. Step 4: Simplify right side
    172,300.91x = 13,951,572,157.93
  5. Step 5: Solve for x
    x = 13,951,572,157.93/172,300.91
  6. Step 6: Final answer
    x = 80,972.14

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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.