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Finding the Fourth Proportional to 87,620.60, 131,430.90 and 40,964.60

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Solution

The fourth proportional to 87,620.60, 131,430.90 and 40,964.60 is: 61,446.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,620.60 : 131,430.90 = 40,964.60 : x
  2. Step 2: Convert to fraction form
    87,620.60/131,430.90 = 40,964.60/x
  3. Step 3: Cross multiply
    87,620.60x = 131,430.90 × 40,964.60
  4. Step 4: Simplify right side
    87,620.60x = 5,384,014,246.14
  5. Step 5: Solve for x
    x = 5,384,014,246.14/87,620.60
  6. Step 6: Final answer
    x = 61,446.90

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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.