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Finding the Fourth Proportional to 193,040.80, 289,561.20 and 66,680.80

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Solution

The fourth proportional to 193,040.80, 289,561.20 and 66,680.80 is: 100,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,040.80 : 289,561.20 = 66,680.80 : x
  2. Step 2: Convert to fraction form
    193,040.80/289,561.20 = 66,680.80/x
  3. Step 3: Cross multiply
    193,040.80x = 289,561.20 × 66,680.80
  4. Step 4: Simplify right side
    193,040.80x = 19,308,172,464.96
  5. Step 5: Solve for x
    x = 19,308,172,464.96/193,040.80
  6. Step 6: Final answer
    x = 100,021.20

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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.