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Finding the Fourth Proportional to 136,668.40, 188,530.68 and 111,203.20

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Solution

The fourth proportional to 136,668.40, 188,530.68 and 111,203.20 is: 153,402.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,668.40 : 188,530.68 = 111,203.20 : x
  2. Step 2: Convert to fraction form
    136,668.40/188,530.68 = 111,203.20/x
  3. Step 3: Cross multiply
    136,668.40x = 188,530.68 × 111,203.20
  4. Step 4: Simplify right side
    136,668.40x = 20,965,214,914.18
  5. Step 5: Solve for x
    x = 20,965,214,914.18/136,668.40
  6. Step 6: Final answer
    x = 153,402.07

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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.