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Finding the Fourth Proportional to 172,857.70, 259,286.55 and 154,195.30

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Solution

The fourth proportional to 172,857.70, 259,286.55 and 154,195.30 is: 231,292.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,857.70 : 259,286.55 = 154,195.30 : x
  2. Step 2: Convert to fraction form
    172,857.70/259,286.55 = 154,195.30/x
  3. Step 3: Cross multiply
    172,857.70x = 259,286.55 × 154,195.30
  4. Step 4: Simplify right side
    172,857.70x = 39,980,767,363.22
  5. Step 5: Solve for x
    x = 39,980,767,363.22/172,857.70
  6. Step 6: Final answer
    x = 231,292.95

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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.