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Finding the Fourth Proportional to 127,690.56, 191,356.56 and 100,918.89

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Solution

The fourth proportional to 127,690.56, 191,356.56 and 100,918.89 is: 151,236.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,690.56 : 191,356.56 = 100,918.89 : x
  2. Step 2: Convert to fraction form
    127,690.56/191,356.56 = 100,918.89/x
  3. Step 3: Cross multiply
    127,690.56x = 191,356.56 × 100,918.89
  4. Step 4: Simplify right side
    127,690.56x = 19,311,491,629.42
  5. Step 5: Solve for x
    x = 19,311,491,629.42/127,690.56
  6. Step 6: Final answer
    x = 151,236.64

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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.