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Finding the Fourth Proportional to 218,680.40, 327,899.40 and 76,487.60

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Solution

The fourth proportional to 218,680.40, 327,899.40 and 76,487.60 is: 114,689.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,680.40 : 327,899.40 = 76,487.60 : x
  2. Step 2: Convert to fraction form
    218,680.40/327,899.40 = 76,487.60/x
  3. Step 3: Cross multiply
    218,680.40x = 327,899.40 × 76,487.60
  4. Step 4: Simplify right side
    218,680.40x = 25,080,238,147.44
  5. Step 5: Solve for x
    x = 25,080,238,147.44/218,680.40
  6. Step 6: Final answer
    x = 114,689.01

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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.