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Finding the Fourth Proportional to 158,556.32, 218,805.24 and 86,936.96

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Solution

The fourth proportional to 158,556.32, 218,805.24 and 86,936.96 is: 119,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,556.32 : 218,805.24 = 86,936.96 : x
  2. Step 2: Convert to fraction form
    158,556.32/218,805.24 = 86,936.96/x
  3. Step 3: Cross multiply
    158,556.32x = 218,805.24 × 86,936.96
  4. Step 4: Simplify right side
    158,556.32x = 19,022,262,397.67
  5. Step 5: Solve for x
    x = 19,022,262,397.67/158,556.32
  6. Step 6: Final answer
    x = 119,971.64

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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.