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Finding the Fourth Proportional to 71,362.66, 107,049.52 and 21,438.84

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Solution

The fourth proportional to 71,362.66, 107,049.52 and 21,438.84 is: 32,159.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,362.66 : 107,049.52 = 21,438.84 : x
  2. Step 2: Convert to fraction form
    71,362.66/107,049.52 = 21,438.84/x
  3. Step 3: Cross multiply
    71,362.66x = 107,049.52 × 21,438.84
  4. Step 4: Simplify right side
    71,362.66x = 2,295,017,531.36
  5. Step 5: Solve for x
    x = 2,295,017,531.36/71,362.66
  6. Step 6: Final answer
    x = 32,159.92

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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.