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Finding the Fourth Proportional to 69,243.51, 103,850.27 and 18,641.28

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Solution

The fourth proportional to 69,243.51, 103,850.27 and 18,641.28 is: 27,957.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,243.51 : 103,850.27 = 18,641.28 : x
  2. Step 2: Convert to fraction form
    69,243.51/103,850.27 = 18,641.28/x
  3. Step 3: Cross multiply
    69,243.51x = 103,850.27 × 18,641.28
  4. Step 4: Simplify right side
    69,243.51x = 1,935,901,961.15
  5. Step 5: Solve for x
    x = 1,935,901,961.15/69,243.51
  6. Step 6: Final answer
    x = 27,957.88

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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.