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Finding the Fourth Proportional to 65,560.30, 98,350.17 and 21,178.78

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Solution

The fourth proportional to 65,560.30, 98,350.17 and 21,178.78 is: 31,771.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,560.30 : 98,350.17 = 21,178.78 : x
  2. Step 2: Convert to fraction form
    65,560.30/98,350.17 = 21,178.78/x
  3. Step 3: Cross multiply
    65,560.30x = 98,350.17 × 21,178.78
  4. Step 4: Simplify right side
    65,560.30x = 2,082,936,613.39
  5. Step 5: Solve for x
    x = 2,082,936,613.39/65,560.30
  6. Step 6: Final answer
    x = 31,771.31

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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.