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Finding the Fourth Proportional to 73,569.78, 110,355.67 and 20,979.25

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Solution

The fourth proportional to 73,569.78, 110,355.67 and 20,979.25 is: 31,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,569.78 : 110,355.67 = 20,979.25 : x
  2. Step 2: Convert to fraction form
    73,569.78/110,355.67 = 20,979.25/x
  3. Step 3: Cross multiply
    73,569.78x = 110,355.67 × 20,979.25
  4. Step 4: Simplify right side
    73,569.78x = 2,315,178,940.18
  5. Step 5: Solve for x
    x = 2,315,178,940.18/73,569.78
  6. Step 6: Final answer
    x = 31,469.16

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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.