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Finding the Fourth Proportional to 172,730.57, 259,131.23 and 72,890.78

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Solution

The fourth proportional to 172,730.57, 259,131.23 and 72,890.78 is: 109,351.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,730.57 : 259,131.23 = 72,890.78 : x
  2. Step 2: Convert to fraction form
    172,730.57/259,131.23 = 72,890.78/x
  3. Step 3: Cross multiply
    172,730.57x = 259,131.23 × 72,890.78
  4. Step 4: Simplify right side
    172,730.57x = 18,888,277,112.61
  5. Step 5: Solve for x
    x = 18,888,277,112.61/172,730.57
  6. Step 6: Final answer
    x = 109,351.10

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1.5x scale

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.