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Finding the Fourth Proportional to 92,018.75, 138,028.21 and 28,843.81

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Solution

The fourth proportional to 92,018.75, 138,028.21 and 28,843.81 is: 43,265.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,018.75 : 138,028.21 = 28,843.81 : x
  2. Step 2: Convert to fraction form
    92,018.75/138,028.21 = 28,843.81/x
  3. Step 3: Cross multiply
    92,018.75x = 138,028.21 × 28,843.81
  4. Step 4: Simplify right side
    92,018.75x = 3,981,259,463.88
  5. Step 5: Solve for x
    x = 3,981,259,463.88/92,018.75
  6. Step 6: Final answer
    x = 43,265.74

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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.