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Finding the Fourth Proportional to 158,593.25, 218,838.57 and 86,954.42

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Solution

The fourth proportional to 158,593.25, 218,838.57 and 86,954.42 is: 119,986.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,593.25 : 218,838.57 = 86,954.42 : x
  2. Step 2: Convert to fraction form
    158,593.25/218,838.57 = 86,954.42/x
  3. Step 3: Cross multiply
    158,593.25x = 218,838.57 × 86,954.42
  4. Step 4: Simplify right side
    158,593.25x = 19,028,980,927.98
  5. Step 5: Solve for x
    x = 19,028,980,927.98/158,593.25
  6. Step 6: Final answer
    x = 119,986.07

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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.