Home / 115,110.81-158,853.20-66,722.09

Finding the Fourth Proportional to 115,110.81, 158,853.20 and 66,722.09

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Solution

The fourth proportional to 115,110.81, 158,853.20 and 66,722.09 is: 92,076.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,110.81 : 158,853.20 = 66,722.09 : x
  2. Step 2: Convert to fraction form
    115,110.81/158,853.20 = 66,722.09/x
  3. Step 3: Cross multiply
    115,110.81x = 158,853.20 × 66,722.09
  4. Step 4: Simplify right side
    115,110.81x = 10,599,016,379.31
  5. Step 5: Solve for x
    x = 10,599,016,379.31/115,110.81
  6. Step 6: Final answer
    x = 92,076.64

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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.