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Finding the Fourth Proportional to 86,222.88, 129,256.56 and 30,805.92

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Solution

The fourth proportional to 86,222.88, 129,256.56 and 30,805.92 is: 46,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,222.88 : 129,256.56 = 30,805.92 : x
  2. Step 2: Convert to fraction form
    86,222.88/129,256.56 = 30,805.92/x
  3. Step 3: Cross multiply
    86,222.88x = 129,256.56 × 30,805.92
  4. Step 4: Simplify right side
    86,222.88x = 3,981,867,246.84
  5. Step 5: Solve for x
    x = 3,981,867,246.84/86,222.88
  6. Step 6: Final answer
    x = 46,181.10

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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.