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Finding the Fourth Proportional to 99,540.40, 149,310.60 and 68,047.60

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Solution

The fourth proportional to 99,540.40, 149,310.60 and 68,047.60 is: 102,071.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,540.40 : 149,310.60 = 68,047.60 : x
  2. Step 2: Convert to fraction form
    99,540.40/149,310.60 = 68,047.60/x
  3. Step 3: Cross multiply
    99,540.40x = 149,310.60 × 68,047.60
  4. Step 4: Simplify right side
    99,540.40x = 10,160,227,984.56
  5. Step 5: Solve for x
    x = 10,160,227,984.56/99,540.40
  6. Step 6: Final answer
    x = 102,071.40

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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.