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Finding the Fourth Proportional to 65,561.80, 98,333.10 and 18,809.80

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Solution

The fourth proportional to 65,561.80, 98,333.10 and 18,809.80 is: 28,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,561.80 : 98,333.10 = 18,809.80 : x
  2. Step 2: Convert to fraction form
    65,561.80/98,333.10 = 18,809.80/x
  3. Step 3: Cross multiply
    65,561.80x = 98,333.10 × 18,809.80
  4. Step 4: Simplify right side
    65,561.80x = 1,849,625,944.38
  5. Step 5: Solve for x
    x = 1,849,625,944.38/65,561.80
  6. Step 6: Final answer
    x = 28,211.95

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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.