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Finding the Fourth Proportional to 71,922.80, 99,253.50 and 40,090.98

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Solution

The fourth proportional to 71,922.80, 99,253.50 and 40,090.98 is: 55,325.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,922.80 : 99,253.50 = 40,090.98 : x
  2. Step 2: Convert to fraction form
    71,922.80/99,253.50 = 40,090.98/x
  3. Step 3: Cross multiply
    71,922.80x = 99,253.50 × 40,090.98
  4. Step 4: Simplify right side
    71,922.80x = 3,979,170,083.43
  5. Step 5: Solve for x
    x = 3,979,170,083.43/71,922.80
  6. Step 6: Final answer
    x = 55,325.57

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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.