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Finding the Fourth Proportional to 148,978.44, 205,586.10 and 80,992.44

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Solution

The fourth proportional to 148,978.44, 205,586.10 and 80,992.44 is: 111,767.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,978.44 : 205,586.10 = 80,992.44 : x
  2. Step 2: Convert to fraction form
    148,978.44/205,586.10 = 80,992.44/x
  3. Step 3: Cross multiply
    148,978.44x = 205,586.10 × 80,992.44
  4. Step 4: Simplify right side
    148,978.44x = 16,650,919,869.08
  5. Step 5: Solve for x
    x = 16,650,919,869.08/148,978.44
  6. Step 6: Final answer
    x = 111,767.31

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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.