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Finding the Fourth Proportional to 172,711.78, 259,102.60 and 72,872.18

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Solution

The fourth proportional to 172,711.78, 259,102.60 and 72,872.18 is: 109,323.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,711.78 : 259,102.60 = 72,872.18 : x
  2. Step 2: Convert to fraction form
    172,711.78/259,102.60 = 72,872.18/x
  3. Step 3: Cross multiply
    172,711.78x = 259,102.60 × 72,872.18
  4. Step 4: Simplify right side
    172,711.78x = 18,881,371,305.67
  5. Step 5: Solve for x
    x = 18,881,371,305.67/172,711.78
  6. Step 6: Final answer
    x = 109,323.01

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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.