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Finding the Fourth Proportional to 66,072.40, 98,906.10 and 36,399.40

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Solution

The fourth proportional to 66,072.40, 98,906.10 and 36,399.40 is: 54,487.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,072.40 : 98,906.10 = 36,399.40 : x
  2. Step 2: Convert to fraction form
    66,072.40/98,906.10 = 36,399.40/x
  3. Step 3: Cross multiply
    66,072.40x = 98,906.10 × 36,399.40
  4. Step 4: Simplify right side
    66,072.40x = 3,600,122,696.34
  5. Step 5: Solve for x
    x = 3,600,122,696.34/66,072.40
  6. Step 6: Final answer
    x = 54,487.54

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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.