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Finding the Fourth Proportional to 158,249.70, 218,387.16 and 86,628.51

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Solution

The fourth proportional to 158,249.70, 218,387.16 and 86,628.51 is: 119,548.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,249.70 : 218,387.16 = 86,628.51 : x
  2. Step 2: Convert to fraction form
    158,249.70/218,387.16 = 86,628.51/x
  3. Step 3: Cross multiply
    158,249.70x = 218,387.16 × 86,628.51
  4. Step 4: Simplify right side
    158,249.70x = 18,918,554,273.93
  5. Step 5: Solve for x
    x = 18,918,554,273.93/158,249.70
  6. Step 6: Final answer
    x = 119,548.75

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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.