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Finding the Fourth Proportional to 66,009.06, 98,974.03 and 21,010.97

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Solution

The fourth proportional to 66,009.06, 98,974.03 and 21,010.97 is: 31,503.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,009.06 : 98,974.03 = 21,010.97 : x
  2. Step 2: Convert to fraction form
    66,009.06/98,974.03 = 21,010.97/x
  3. Step 3: Cross multiply
    66,009.06x = 98,974.03 × 21,010.97
  4. Step 4: Simplify right side
    66,009.06x = 2,079,540,375.11
  5. Step 5: Solve for x
    x = 2,079,540,375.11/66,009.06
  6. Step 6: Final answer
    x = 31,503.87

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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.