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Finding the Fourth Proportional to 71,626.50, 98,835.66 and 39,791.34

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Solution

The fourth proportional to 71,626.50, 98,835.66 and 39,791.34 is: 54,907.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,626.50 : 98,835.66 = 39,791.34 : x
  2. Step 2: Convert to fraction form
    71,626.50/98,835.66 = 39,791.34/x
  3. Step 3: Cross multiply
    71,626.50x = 98,835.66 × 39,791.34
  4. Step 4: Simplify right side
    71,626.50x = 3,932,803,351.18
  5. Step 5: Solve for x
    x = 3,932,803,351.18/71,626.50
  6. Step 6: Final answer
    x = 54,907.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.