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Finding the Fourth Proportional to 71,940.30, 107,941.54 and 38,621.44

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Solution

The fourth proportional to 71,940.30, 107,941.54 and 38,621.44 is: 57,948.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,940.30 : 107,941.54 = 38,621.44 : x
  2. Step 2: Convert to fraction form
    71,940.30/107,941.54 = 38,621.44/x
  3. Step 3: Cross multiply
    71,940.30x = 107,941.54 × 38,621.44
  4. Step 4: Simplify right side
    71,940.30x = 4,168,857,710.62
  5. Step 5: Solve for x
    x = 4,168,857,710.62/71,940.30
  6. Step 6: Final answer
    x = 57,948.85

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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.