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Finding the Fourth Proportional to 66,401.65, 91,631.60 and 36,186.32

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Solution

The fourth proportional to 66,401.65, 91,631.60 and 36,186.32 is: 49,935.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,401.65 : 91,631.60 = 36,186.32 : x
  2. Step 2: Convert to fraction form
    66,401.65/91,631.60 = 36,186.32/x
  3. Step 3: Cross multiply
    66,401.65x = 91,631.60 × 36,186.32
  4. Step 4: Simplify right side
    66,401.65x = 3,315,810,823.22
  5. Step 5: Solve for x
    x = 3,315,810,823.22/66,401.65
  6. Step 6: Final answer
    x = 49,935.67

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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.