Home / 107,986.20-161,979.30-72,556.80

Finding the Fourth Proportional to 107,986.20, 161,979.30 and 72,556.80

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Solution

The fourth proportional to 107,986.20, 161,979.30 and 72,556.80 is: 108,835.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,986.20 : 161,979.30 = 72,556.80 : x
  2. Step 2: Convert to fraction form
    107,986.20/161,979.30 = 72,556.80/x
  3. Step 3: Cross multiply
    107,986.20x = 161,979.30 × 72,556.80
  4. Step 4: Simplify right side
    107,986.20x = 11,752,699,674.24
  5. Step 5: Solve for x
    x = 11,752,699,674.24/107,986.20
  6. Step 6: Final answer
    x = 108,835.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.