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Finding the Fourth Proportional to 111,803.67, 154,234.86 and 66,449.55

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Solution

The fourth proportional to 111,803.67, 154,234.86 and 66,449.55 is: 91,668.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,803.67 : 154,234.86 = 66,449.55 : x
  2. Step 2: Convert to fraction form
    111,803.67/154,234.86 = 66,449.55/x
  3. Step 3: Cross multiply
    111,803.67x = 154,234.86 × 66,449.55
  4. Step 4: Simplify right side
    111,803.67x = 10,248,837,041.31
  5. Step 5: Solve for x
    x = 10,248,837,041.31/111,803.67
  6. Step 6: Final answer
    x = 91,668.16

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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.