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Finding the Fourth Proportional to 66,556.80, 99,820.80 and 29,116.80

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Solution

The fourth proportional to 66,556.80, 99,820.80 and 29,116.80 is: 43,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,556.80 : 99,820.80 = 29,116.80 : x
  2. Step 2: Convert to fraction form
    66,556.80/99,820.80 = 29,116.80/x
  3. Step 3: Cross multiply
    66,556.80x = 99,820.80 × 29,116.80
  4. Step 4: Simplify right side
    66,556.80x = 2,906,462,269.44
  5. Step 5: Solve for x
    x = 2,906,462,269.44/66,556.80
  6. Step 6: Final answer
    x = 43,668.90

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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.