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Finding the Fourth Proportional to 148,889.80, 205,467.54 and 80,906.78

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Solution

The fourth proportional to 148,889.80, 205,467.54 and 80,906.78 is: 111,651.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,889.80 : 205,467.54 = 80,906.78 : x
  2. Step 2: Convert to fraction form
    148,889.80/205,467.54 = 80,906.78/x
  3. Step 3: Cross multiply
    148,889.80x = 205,467.54 × 80,906.78
  4. Step 4: Simplify right side
    148,889.80x = 16,623,717,055.92
  5. Step 5: Solve for x
    x = 16,623,717,055.92/148,889.80
  6. Step 6: Final answer
    x = 111,651.15

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1.5x scale

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.