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Finding the Fourth Proportional to 69,239.21, 103,868.82 and 21,838.19

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Solution

The fourth proportional to 69,239.21, 103,868.82 and 21,838.19 is: 32,760.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,239.21 : 103,868.82 = 21,838.19 : x
  2. Step 2: Convert to fraction form
    69,239.21/103,868.82 = 21,838.19/x
  3. Step 3: Cross multiply
    69,239.21x = 103,868.82 × 21,838.19
  4. Step 4: Simplify right side
    69,239.21x = 2,268,307,026.24
  5. Step 5: Solve for x
    x = 2,268,307,026.24/69,239.21
  6. Step 6: Final answer
    x = 32,760.44

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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.