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Finding the Fourth Proportional to 51,076.80, 76,469.40 and 45,244.80

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Solution

The fourth proportional to 51,076.80, 76,469.40 and 45,244.80 is: 67,738.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,076.80 : 76,469.40 = 45,244.80 : x
  2. Step 2: Convert to fraction form
    51,076.80/76,469.40 = 45,244.80/x
  3. Step 3: Cross multiply
    51,076.80x = 76,469.40 × 45,244.80
  4. Step 4: Simplify right side
    51,076.80x = 3,459,842,709.12
  5. Step 5: Solve for x
    x = 3,459,842,709.12/51,076.80
  6. Step 6: Final answer
    x = 67,738.05

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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.