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Finding the Fourth Proportional to 172,806.75, 259,312.19 and 72,960.48

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Solution

The fourth proportional to 172,806.75, 259,312.19 and 72,960.48 is: 109,483.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,806.75 : 259,312.19 = 72,960.48 : x
  2. Step 2: Convert to fraction form
    172,806.75/259,312.19 = 72,960.48/x
  3. Step 3: Cross multiply
    172,806.75x = 259,312.19 × 72,960.48
  4. Step 4: Simplify right side
    172,806.75x = 18,919,541,487.45
  5. Step 5: Solve for x
    x = 18,919,541,487.45/172,806.75
  6. Step 6: Final answer
    x = 109,483.81

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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.