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Finding the Fourth Proportional to 69,281.01, 103,906.53 and 21,899.79

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Solution

The fourth proportional to 69,281.01, 103,906.53 and 21,899.79 is: 32,844.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,281.01 : 103,906.53 = 21,899.79 : x
  2. Step 2: Convert to fraction form
    69,281.01/103,906.53 = 21,899.79/x
  3. Step 3: Cross multiply
    69,281.01x = 103,906.53 × 21,899.79
  4. Step 4: Simplify right side
    69,281.01x = 2,275,531,186.63
  5. Step 5: Solve for x
    x = 2,275,531,186.63/69,281.01
  6. Step 6: Final answer
    x = 32,844.95

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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.