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Finding the Fourth Proportional to 148,997.88, 205,617.07 and 81,929.88

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Solution

The fourth proportional to 148,997.88, 205,617.07 and 81,929.88 is: 113,063.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,997.88 : 205,617.07 = 81,929.88 : x
  2. Step 2: Convert to fraction form
    148,997.88/205,617.07 = 81,929.88/x
  3. Step 3: Cross multiply
    148,997.88x = 205,617.07 × 81,929.88
  4. Step 4: Simplify right side
    148,997.88x = 16,846,181,871.05
  5. Step 5: Solve for x
    x = 16,846,181,871.05/148,997.88
  6. Step 6: Final answer
    x = 113,063.23

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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.