Home / 86,519.24-129,778.62-20,855.24

Finding the Fourth Proportional to 86,519.24, 129,778.62 and 20,855.24

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Solution

The fourth proportional to 86,519.24, 129,778.62 and 20,855.24 is: 31,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,519.24 : 129,778.62 = 20,855.24 : x
  2. Step 2: Convert to fraction form
    86,519.24/129,778.62 = 20,855.24/x
  3. Step 3: Cross multiply
    86,519.24x = 129,778.62 × 20,855.24
  4. Step 4: Simplify right side
    86,519.24x = 2,706,564,266.97
  5. Step 5: Solve for x
    x = 2,706,564,266.97/86,519.24
  6. Step 6: Final answer
    x = 31,282.80

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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.