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Finding the Fourth Proportional to 73,399.65, 110,103.66 and 20,805

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Solution

The fourth proportional to 73,399.65, 110,103.66 and 20,805 is: 31,208.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,399.65 : 110,103.66 = 20,805 : x
  2. Step 2: Convert to fraction form
    73,399.65/110,103.66 = 20,805/x
  3. Step 3: Cross multiply
    73,399.65x = 110,103.66 × 20,805
  4. Step 4: Simplify right side
    73,399.65x = 2,290,706,646.30
  5. Step 5: Solve for x
    x = 2,290,706,646.30/73,399.65
  6. Step 6: Final answer
    x = 31,208.69

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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.