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Finding the Fourth Proportional to 116,561.65, 160,839.95 and 65,572.66

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Solution

The fourth proportional to 116,561.65, 160,839.95 and 65,572.66 is: 90,481.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,561.65 : 160,839.95 = 65,572.66 : x
  2. Step 2: Convert to fraction form
    116,561.65/160,839.95 = 65,572.66/x
  3. Step 3: Cross multiply
    116,561.65x = 160,839.95 × 65,572.66
  4. Step 4: Simplify right side
    116,561.65x = 10,546,702,871.70
  5. Step 5: Solve for x
    x = 10,546,702,871.70/116,561.65
  6. Step 6: Final answer
    x = 90,481.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.