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Finding the Fourth Proportional to 71,806.64, 99,090.84 and 39,974.48

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Solution

The fourth proportional to 71,806.64, 99,090.84 and 39,974.48 is: 55,163.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,806.64 : 99,090.84 = 39,974.48 : x
  2. Step 2: Convert to fraction form
    71,806.64/99,090.84 = 39,974.48/x
  3. Step 3: Cross multiply
    71,806.64x = 99,090.84 × 39,974.48
  4. Step 4: Simplify right side
    71,806.64x = 3,961,104,801.76
  5. Step 5: Solve for x
    x = 3,961,104,801.76/71,806.64
  6. Step 6: Final answer
    x = 55,163.49

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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.