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Finding the Fourth Proportional to 66,654.20, 91,981.76 and 36,438.83

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Solution

The fourth proportional to 66,654.20, 91,981.76 and 36,438.83 is: 50,285.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,654.20 : 91,981.76 = 36,438.83 : x
  2. Step 2: Convert to fraction form
    66,654.20/91,981.76 = 36,438.83/x
  3. Step 3: Cross multiply
    66,654.20x = 91,981.76 × 36,438.83
  4. Step 4: Simplify right side
    66,654.20x = 3,351,707,418.57
  5. Step 5: Solve for x
    x = 3,351,707,418.57/66,654.20
  6. Step 6: Final answer
    x = 50,285.01

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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.