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Finding the Fourth Proportional to 52,721, 79,081.58 and 21,556.20

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Solution

The fourth proportional to 52,721, 79,081.58 and 21,556.20 is: 32,334.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,721 : 79,081.58 = 21,556.20 : x
  2. Step 2: Convert to fraction form
    52,721/79,081.58 = 21,556.20/x
  3. Step 3: Cross multiply
    52,721x = 79,081.58 × 21,556.20
  4. Step 4: Simplify right side
    52,721x = 1,704,698,354.80
  5. Step 5: Solve for x
    x = 1,704,698,354.80/52,721
  6. Step 6: Final answer
    x = 32,334.33

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1.5x scale

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.