Home / 86,556.30-129,834.45-71,976.30

Finding the Fourth Proportional to 86,556.30, 129,834.45 and 71,976.30

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Solution

The fourth proportional to 86,556.30, 129,834.45 and 71,976.30 is: 107,964.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,556.30 : 129,834.45 = 71,976.30 : x
  2. Step 2: Convert to fraction form
    86,556.30/129,834.45 = 71,976.30/x
  3. Step 3: Cross multiply
    86,556.30x = 129,834.45 × 71,976.30
  4. Step 4: Simplify right side
    86,556.30x = 9,345,003,323.54
  5. Step 5: Solve for x
    x = 9,345,003,323.54/86,556.30
  6. Step 6: Final answer
    x = 107,964.45

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Similar ratio
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1.5x scale

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.