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Finding the Fourth Proportional to 172,812.40, 259,218.60 and 133,446.40

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Solution

The fourth proportional to 172,812.40, 259,218.60 and 133,446.40 is: 200,169.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,812.40 : 259,218.60 = 133,446.40 : x
  2. Step 2: Convert to fraction form
    172,812.40/259,218.60 = 133,446.40/x
  3. Step 3: Cross multiply
    172,812.40x = 259,218.60 × 133,446.40
  4. Step 4: Simplify right side
    172,812.40x = 34,591,788,983.04
  5. Step 5: Solve for x
    x = 34,591,788,983.04/172,812.40
  6. Step 6: Final answer
    x = 200,169.60

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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.