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Finding the Fourth Proportional to 66,400.46, 91,630.95 and 36,186.56

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Solution

The fourth proportional to 66,400.46, 91,630.95 and 36,186.56 is: 49,936.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.46 : 91,630.95 = 36,186.56 : x
  2. Step 2: Convert to fraction form
    66,400.46/91,630.95 = 36,186.56/x
  3. Step 3: Cross multiply
    66,400.46x = 91,630.95 × 36,186.56
  4. Step 4: Simplify right side
    66,400.46x = 3,315,808,870.03
  5. Step 5: Solve for x
    x = 3,315,808,870.03/66,400.46
  6. Step 6: Final answer
    x = 49,936.53

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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.