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Finding the Fourth Proportional to 69,309.61, 103,968.20 and 21,921.17

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Solution

The fourth proportional to 69,309.61, 103,968.20 and 21,921.17 is: 32,882.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,309.61 : 103,968.20 = 21,921.17 : x
  2. Step 2: Convert to fraction form
    69,309.61/103,968.20 = 21,921.17/x
  3. Step 3: Cross multiply
    69,309.61x = 103,968.20 × 21,921.17
  4. Step 4: Simplify right side
    69,309.61x = 2,279,104,066.95
  5. Step 5: Solve for x
    x = 2,279,104,066.95/69,309.61
  6. Step 6: Final answer
    x = 32,882.94

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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.