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Finding the Fourth Proportional to 86,315.65, 129,493.81 and 27,151.33

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Solution

The fourth proportional to 86,315.65, 129,493.81 and 27,151.33 is: 40,733.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,315.65 : 129,493.81 = 27,151.33 : x
  2. Step 2: Convert to fraction form
    86,315.65/129,493.81 = 27,151.33/x
  3. Step 3: Cross multiply
    86,315.65x = 129,493.81 × 27,151.33
  4. Step 4: Simplify right side
    86,315.65x = 3,515,928,833.43
  5. Step 5: Solve for x
    x = 3,515,928,833.43/86,315.65
  6. Step 6: Final answer
    x = 40,733.39

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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.