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Finding the Fourth Proportional to 87,448.40, 131,021.40 and 40,605.20

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Solution

The fourth proportional to 87,448.40, 131,021.40 and 40,605.20 is: 60,837.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,448.40 : 131,021.40 = 40,605.20 : x
  2. Step 2: Convert to fraction form
    87,448.40/131,021.40 = 40,605.20/x
  3. Step 3: Cross multiply
    87,448.40x = 131,021.40 × 40,605.20
  4. Step 4: Simplify right side
    87,448.40x = 5,320,150,151.28
  5. Step 5: Solve for x
    x = 5,320,150,151.28/87,448.40
  6. Step 6: Final answer
    x = 60,837.59

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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.