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Finding the Fourth Proportional to 172,935.20, 259,201.20 and 79,450.40

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Solution

The fourth proportional to 172,935.20, 259,201.20 and 79,450.40 is: 119,082.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,935.20 : 259,201.20 = 79,450.40 : x
  2. Step 2: Convert to fraction form
    172,935.20/259,201.20 = 79,450.40/x
  3. Step 3: Cross multiply
    172,935.20x = 259,201.20 × 79,450.40
  4. Step 4: Simplify right side
    172,935.20x = 20,593,639,020.48
  5. Step 5: Solve for x
    x = 20,593,639,020.48/172,935.20
  6. Step 6: Final answer
    x = 119,082.98

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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.