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Finding the Fourth Proportional to 81,403.62, 122,007.01 and 41,939.20

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Solution

The fourth proportional to 81,403.62, 122,007.01 and 41,939.20 is: 62,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,403.62 : 122,007.01 = 41,939.20 : x
  2. Step 2: Convert to fraction form
    81,403.62/122,007.01 = 41,939.20/x
  3. Step 3: Cross multiply
    81,403.62x = 122,007.01 × 41,939.20
  4. Step 4: Simplify right side
    81,403.62x = 5,116,876,184.10
  5. Step 5: Solve for x
    x = 5,116,876,184.10/81,403.62
  6. Step 6: Final answer
    x = 62,858.10

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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.