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Finding the Fourth Proportional to 136,218.36, 203,933.88 and 86,354.76

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Solution

The fourth proportional to 136,218.36, 203,933.88 and 86,354.76 is: 129,282.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,218.36 : 203,933.88 = 86,354.76 : x
  2. Step 2: Convert to fraction form
    136,218.36/203,933.88 = 86,354.76/x
  3. Step 3: Cross multiply
    136,218.36x = 203,933.88 × 86,354.76
  4. Step 4: Simplify right side
    136,218.36x = 17,610,661,263.27
  5. Step 5: Solve for x
    x = 17,610,661,263.27/136,218.36
  6. Step 6: Final answer
    x = 129,282.58

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1.5x scale

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.