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Finding the Fourth Proportional to 53,912.90, 80,869.35 and 45,164.90

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Solution

The fourth proportional to 53,912.90, 80,869.35 and 45,164.90 is: 67,747.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,912.90 : 80,869.35 = 45,164.90 : x
  2. Step 2: Convert to fraction form
    53,912.90/80,869.35 = 45,164.90/x
  3. Step 3: Cross multiply
    53,912.90x = 80,869.35 × 45,164.90
  4. Step 4: Simplify right side
    53,912.90x = 3,652,456,105.82
  5. Step 5: Solve for x
    x = 3,652,456,105.82/53,912.90
  6. Step 6: Final answer
    x = 67,747.35

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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.