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Finding the Fourth Proportional to 136,666.40, 188,527.92 and 111,201.20

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Solution

The fourth proportional to 136,666.40, 188,527.92 and 111,201.20 is: 153,399.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,666.40 : 188,527.92 = 111,201.20 : x
  2. Step 2: Convert to fraction form
    136,666.40/188,527.92 = 111,201.20/x
  3. Step 3: Cross multiply
    136,666.40x = 188,527.92 × 111,201.20
  4. Step 4: Simplify right side
    136,666.40x = 20,964,530,937.50
  5. Step 5: Solve for x
    x = 20,964,530,937.50/136,666.40
  6. Step 6: Final answer
    x = 153,399.31

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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.