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Finding the Fourth Proportional to 148,912.80, 205,500.48 and 80,930.40

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Solution

The fourth proportional to 148,912.80, 205,500.48 and 80,930.40 is: 111,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,912.80 : 205,500.48 = 80,930.40 : x
  2. Step 2: Convert to fraction form
    148,912.80/205,500.48 = 80,930.40/x
  3. Step 3: Cross multiply
    148,912.80x = 205,500.48 × 80,930.40
  4. Step 4: Simplify right side
    148,912.80x = 16,631,236,046.59
  5. Step 5: Solve for x
    x = 16,631,236,046.59/148,912.80
  6. Step 6: Final answer
    x = 111,684.40

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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.