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Finding the Fourth Proportional to 85,837.68, 128,668.68 and 33,226.80

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Solution

The fourth proportional to 85,837.68, 128,668.68 and 33,226.80 is: 49,806.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,837.68 : 128,668.68 = 33,226.80 : x
  2. Step 2: Convert to fraction form
    85,837.68/128,668.68 = 33,226.80/x
  3. Step 3: Cross multiply
    85,837.68x = 128,668.68 × 33,226.80
  4. Step 4: Simplify right side
    85,837.68x = 4,275,248,496.62
  5. Step 5: Solve for x
    x = 4,275,248,496.62/85,837.68
  6. Step 6: Final answer
    x = 49,806.20

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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.