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Finding the Fourth Proportional to 111,992.80, 167,881.20 and 64,559.20

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Solution

The fourth proportional to 111,992.80, 167,881.20 and 64,559.20 is: 96,776.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,992.80 : 167,881.20 = 64,559.20 : x
  2. Step 2: Convert to fraction form
    111,992.80/167,881.20 = 64,559.20/x
  3. Step 3: Cross multiply
    111,992.80x = 167,881.20 × 64,559.20
  4. Step 4: Simplify right side
    111,992.80x = 10,838,275,967.04
  5. Step 5: Solve for x
    x = 10,838,275,967.04/111,992.80
  6. Step 6: Final answer
    x = 96,776.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.