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Finding the Fourth Proportional to 158,464.39, 218,675.91 and 86,843.11

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Solution

The fourth proportional to 158,464.39, 218,675.91 and 86,843.11 is: 119,840.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,464.39 : 218,675.91 = 86,843.11 : x
  2. Step 2: Convert to fraction form
    158,464.39/218,675.91 = 86,843.11/x
  3. Step 3: Cross multiply
    158,464.39x = 218,675.91 × 86,843.11
  4. Step 4: Simplify right side
    158,464.39x = 18,990,496,106.48
  5. Step 5: Solve for x
    x = 18,990,496,106.48/158,464.39
  6. Step 6: Final answer
    x = 119,840.78

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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.