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Finding the Fourth Proportional to 66,640.36, 99,987.88 and 27,201.48

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Solution

The fourth proportional to 66,640.36, 99,987.88 and 27,201.48 is: 40,813.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.36 : 99,987.88 = 27,201.48 : x
  2. Step 2: Convert to fraction form
    66,640.36/99,987.88 = 27,201.48/x
  3. Step 3: Cross multiply
    66,640.36x = 99,987.88 × 27,201.48
  4. Step 4: Simplify right side
    66,640.36x = 2,719,818,318.06
  5. Step 5: Solve for x
    x = 2,719,818,318.06/66,640.36
  6. Step 6: Final answer
    x = 40,813.38

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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.