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Finding the Fourth Proportional to 71,697.74, 98,942.25 and 39,866.36

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Solution

The fourth proportional to 71,697.74, 98,942.25 and 39,866.36 is: 55,015.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,697.74 : 98,942.25 = 39,866.36 : x
  2. Step 2: Convert to fraction form
    71,697.74/98,942.25 = 39,866.36/x
  3. Step 3: Cross multiply
    71,697.74x = 98,942.25 × 39,866.36
  4. Step 4: Simplify right side
    71,697.74x = 3,944,466,863.00
  5. Step 5: Solve for x
    x = 3,944,466,863.00/71,697.74
  6. Step 6: Final answer
    x = 55,015.22

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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.