Home / 158,722.62-219,039.87-87,109.30

Finding the Fourth Proportional to 158,722.62, 219,039.87 and 87,109.30

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Solution

The fourth proportional to 158,722.62, 219,039.87 and 87,109.30 is: 120,212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,722.62 : 219,039.87 = 87,109.30 : x
  2. Step 2: Convert to fraction form
    158,722.62/219,039.87 = 87,109.30/x
  3. Step 3: Cross multiply
    158,722.62x = 219,039.87 × 87,109.30
  4. Step 4: Simplify right side
    158,722.62x = 19,080,409,747.79
  5. Step 5: Solve for x
    x = 19,080,409,747.79/158,722.62
  6. Step 6: Final answer
    x = 120,212.29

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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.