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Finding the Fourth Proportional to 73,737.78, 110,610.82 and 21,145.90

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Solution

The fourth proportional to 73,737.78, 110,610.82 and 21,145.90 is: 31,720.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,737.78 : 110,610.82 = 21,145.90 : x
  2. Step 2: Convert to fraction form
    73,737.78/110,610.82 = 21,145.90/x
  3. Step 3: Cross multiply
    73,737.78x = 110,610.82 × 21,145.90
  4. Step 4: Simplify right side
    73,737.78x = 2,338,965,338.64
  5. Step 5: Solve for x
    x = 2,338,965,338.64/73,737.78
  6. Step 6: Final answer
    x = 31,720.04

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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.