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Finding the Fourth Proportional to 158,249.94, 218,390.07 and 86,629.96

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Solution

The fourth proportional to 158,249.94, 218,390.07 and 86,629.96 is: 119,552.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,249.94 : 218,390.07 = 86,629.96 : x
  2. Step 2: Convert to fraction form
    158,249.94/218,390.07 = 86,629.96/x
  3. Step 3: Cross multiply
    158,249.94x = 218,390.07 × 86,629.96
  4. Step 4: Simplify right side
    158,249.94x = 18,919,123,028.50
  5. Step 5: Solve for x
    x = 18,919,123,028.50/158,249.94
  6. Step 6: Final answer
    x = 119,552.17

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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.