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Finding the Fourth Proportional to 79,984.72, 119,725.46 and 54,877.96

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Solution

The fourth proportional to 79,984.72, 119,725.46 and 54,877.96 is: 82,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,984.72 : 119,725.46 = 54,877.96 : x
  2. Step 2: Convert to fraction form
    79,984.72/119,725.46 = 54,877.96/x
  3. Step 3: Cross multiply
    79,984.72x = 119,725.46 × 54,877.96
  4. Step 4: Simplify right side
    79,984.72x = 6,570,289,004.86
  5. Step 5: Solve for x
    x = 6,570,289,004.86/79,984.72
  6. Step 6: Final answer
    x = 82,144.30

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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.