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Finding the Fourth Proportional to 69,399, 104,101.38 and 20,151

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Solution

The fourth proportional to 69,399, 104,101.38 and 20,151 is: 30,227.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,399 : 104,101.38 = 20,151 : x
  2. Step 2: Convert to fraction form
    69,399/104,101.38 = 20,151/x
  3. Step 3: Cross multiply
    69,399x = 104,101.38 × 20,151
  4. Step 4: Simplify right side
    69,399x = 2,097,746,908.38
  5. Step 5: Solve for x
    x = 2,097,746,908.38/69,399
  6. Step 6: Final answer
    x = 30,227.34

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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.