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Finding the Fourth Proportional to 53,912.40, 80,879.40 and 45,207.60

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Solution

The fourth proportional to 53,912.40, 80,879.40 and 45,207.60 is: 67,820.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,912.40 : 80,879.40 = 45,207.60 : x
  2. Step 2: Convert to fraction form
    53,912.40/80,879.40 = 45,207.60/x
  3. Step 3: Cross multiply
    53,912.40x = 80,879.40 × 45,207.60
  4. Step 4: Simplify right side
    53,912.40x = 3,656,363,563.44
  5. Step 5: Solve for x
    x = 3,656,363,563.44/53,912.40
  6. Step 6: Final answer
    x = 67,820.46

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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.