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Finding the Fourth Proportional to 148,872.84, 205,442.03 and 80,890.86

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Solution

The fourth proportional to 148,872.84, 205,442.03 and 80,890.86 is: 111,628.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,872.84 : 205,442.03 = 80,890.86 : x
  2. Step 2: Convert to fraction form
    148,872.84/205,442.03 = 80,890.86/x
  3. Step 3: Cross multiply
    148,872.84x = 205,442.03 × 80,890.86
  4. Step 4: Simplify right side
    148,872.84x = 16,618,382,486.85
  5. Step 5: Solve for x
    x = 16,618,382,486.85/148,872.84
  6. Step 6: Final answer
    x = 111,628.03

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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.