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Finding the Fourth Proportional to 66,445.80, 99,668.70 and 27,031.20

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Solution

The fourth proportional to 66,445.80, 99,668.70 and 27,031.20 is: 40,546.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,445.80 : 99,668.70 = 27,031.20 : x
  2. Step 2: Convert to fraction form
    66,445.80/99,668.70 = 27,031.20/x
  3. Step 3: Cross multiply
    66,445.80x = 99,668.70 × 27,031.20
  4. Step 4: Simplify right side
    66,445.80x = 2,694,164,563.44
  5. Step 5: Solve for x
    x = 2,694,164,563.44/66,445.80
  6. Step 6: Final answer
    x = 40,546.80

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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.