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Finding the Fourth Proportional to 111,728.22, 154,215.54 and 65,828.22

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Solution

The fourth proportional to 111,728.22, 154,215.54 and 65,828.22 is: 90,860.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,728.22 : 154,215.54 = 65,828.22 : x
  2. Step 2: Convert to fraction form
    111,728.22/154,215.54 = 65,828.22/x
  3. Step 3: Cross multiply
    111,728.22x = 154,215.54 × 65,828.22
  4. Step 4: Simplify right side
    111,728.22x = 10,151,734,494.54
  5. Step 5: Solve for x
    x = 10,151,734,494.54/111,728.22
  6. Step 6: Final answer
    x = 90,860.97

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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.