Home / 86,623.88-129,935.82-20,959.88

Finding the Fourth Proportional to 86,623.88, 129,935.82 and 20,959.88

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Solution

The fourth proportional to 86,623.88, 129,935.82 and 20,959.88 is: 31,439.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,623.88 : 129,935.82 = 20,959.88 : x
  2. Step 2: Convert to fraction form
    86,623.88/129,935.82 = 20,959.88/x
  3. Step 3: Cross multiply
    86,623.88x = 129,935.82 × 20,959.88
  4. Step 4: Simplify right side
    86,623.88x = 2,723,438,545.22
  5. Step 5: Solve for x
    x = 2,723,438,545.22/86,623.88
  6. Step 6: Final answer
    x = 31,439.81

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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.