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Finding the Fourth Proportional to 43,432.80, 65,098.80 and 20,061.60

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Solution

The fourth proportional to 43,432.80, 65,098.80 and 20,061.60 is: 30,069.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,432.80 : 65,098.80 = 20,061.60 : x
  2. Step 2: Convert to fraction form
    43,432.80/65,098.80 = 20,061.60/x
  3. Step 3: Cross multiply
    43,432.80x = 65,098.80 × 20,061.60
  4. Step 4: Simplify right side
    43,432.80x = 1,305,986,086.08
  5. Step 5: Solve for x
    x = 1,305,986,086.08/43,432.80
  6. Step 6: Final answer
    x = 30,069.12

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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.