Home / 86,139.06-129,208.58-26,979.36

Finding the Fourth Proportional to 86,139.06, 129,208.58 and 26,979.36

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Solution

The fourth proportional to 86,139.06, 129,208.58 and 26,979.36 is: 40,469.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,139.06 : 129,208.58 = 26,979.36 : x
  2. Step 2: Convert to fraction form
    86,139.06/129,208.58 = 26,979.36/x
  3. Step 3: Cross multiply
    86,139.06x = 129,208.58 × 26,979.36
  4. Step 4: Simplify right side
    86,139.06x = 3,485,964,660.01
  5. Step 5: Solve for x
    x = 3,485,964,660.01/86,139.06
  6. Step 6: Final answer
    x = 40,469.04

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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.