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Finding the Fourth Proportional to 172,750.63, 259,161.78 and 72,911.65

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Solution

The fourth proportional to 172,750.63, 259,161.78 and 72,911.65 is: 109,382.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,750.63 : 259,161.78 = 72,911.65 : x
  2. Step 2: Convert to fraction form
    172,750.63/259,161.78 = 72,911.65/x
  3. Step 3: Cross multiply
    172,750.63x = 259,161.78 × 72,911.65
  4. Step 4: Simplify right side
    172,750.63x = 18,895,911,700.93
  5. Step 5: Solve for x
    x = 18,895,911,700.93/172,750.63
  6. Step 6: Final answer
    x = 109,382.60

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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.