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Finding the Fourth Proportional to 57,351.21, 86,071.02 and 28,917.21

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Solution

The fourth proportional to 57,351.21, 86,071.02 and 28,917.21 is: 43,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,351.21 : 86,071.02 = 28,917.21 : x
  2. Step 2: Convert to fraction form
    57,351.21/86,071.02 = 28,917.21/x
  3. Step 3: Cross multiply
    57,351.21x = 86,071.02 × 28,917.21
  4. Step 4: Simplify right side
    57,351.21x = 2,488,933,760.25
  5. Step 5: Solve for x
    x = 2,488,933,760.25/57,351.21
  6. Step 6: Final answer
    x = 43,398.10

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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.