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Finding the Fourth Proportional to 172,834.20, 259,316.10 and 67,728.60

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Solution

The fourth proportional to 172,834.20, 259,316.10 and 67,728.60 is: 101,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,834.20 : 259,316.10 = 67,728.60 : x
  2. Step 2: Convert to fraction form
    172,834.20/259,316.10 = 67,728.60/x
  3. Step 3: Cross multiply
    172,834.20x = 259,316.10 × 67,728.60
  4. Step 4: Simplify right side
    172,834.20x = 17,563,116,410.46
  5. Step 5: Solve for x
    x = 17,563,116,410.46/172,834.20
  6. Step 6: Final answer
    x = 101,618.29

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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.