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Finding the Fourth Proportional to 89,921.40, 135,027.90 and 60,469.80

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Solution

The fourth proportional to 89,921.40, 135,027.90 and 60,469.80 is: 90,802.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,921.40 : 135,027.90 = 60,469.80 : x
  2. Step 2: Convert to fraction form
    89,921.40/135,027.90 = 60,469.80/x
  3. Step 3: Cross multiply
    89,921.40x = 135,027.90 × 60,469.80
  4. Step 4: Simplify right side
    89,921.40x = 8,165,110,107.42
  5. Step 5: Solve for x
    x = 8,165,110,107.42/89,921.40
  6. Step 6: Final answer
    x = 90,802.75

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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.