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Finding the Fourth Proportional to 170,938.50, 256,418.55 and 65,757.30

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Solution

The fourth proportional to 170,938.50, 256,418.55 and 65,757.30 is: 98,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,938.50 : 256,418.55 = 65,757.30 : x
  2. Step 2: Convert to fraction form
    170,938.50/256,418.55 = 65,757.30/x
  3. Step 3: Cross multiply
    170,938.50x = 256,418.55 × 65,757.30
  4. Step 4: Simplify right side
    170,938.50x = 16,861,391,517.92
  5. Step 5: Solve for x
    x = 16,861,391,517.92/170,938.50
  6. Step 6: Final answer
    x = 98,640.10

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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.