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Finding the Fourth Proportional to 148,645.55, 205,129.82 and 80,660.80

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Solution

The fourth proportional to 148,645.55, 205,129.82 and 80,660.80 is: 111,311.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,645.55 : 205,129.82 = 80,660.80 : x
  2. Step 2: Convert to fraction form
    148,645.55/205,129.82 = 80,660.80/x
  3. Step 3: Cross multiply
    148,645.55x = 205,129.82 × 80,660.80
  4. Step 4: Simplify right side
    148,645.55x = 16,545,934,468.93
  5. Step 5: Solve for x
    x = 16,545,934,468.93/148,645.55
  6. Step 6: Final answer
    x = 111,311.33

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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.