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Finding the Fourth Proportional to 52,728.90, 79,093.35 and 21,556.86

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Solution

The fourth proportional to 52,728.90, 79,093.35 and 21,556.86 is: 32,335.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,728.90 : 79,093.35 = 21,556.86 : x
  2. Step 2: Convert to fraction form
    52,728.90/79,093.35 = 21,556.86/x
  3. Step 3: Cross multiply
    52,728.90x = 79,093.35 × 21,556.86
  4. Step 4: Simplify right side
    52,728.90x = 1,705,004,272.88
  5. Step 5: Solve for x
    x = 1,705,004,272.88/52,728.90
  6. Step 6: Final answer
    x = 32,335.29

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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.