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Finding the Fourth Proportional to 89,287.48, 133,939.10 and 33,128.20

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Solution

The fourth proportional to 89,287.48, 133,939.10 and 33,128.20 is: 49,695.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,287.48 : 133,939.10 = 33,128.20 : x
  2. Step 2: Convert to fraction form
    89,287.48/133,939.10 = 33,128.20/x
  3. Step 3: Cross multiply
    89,287.48x = 133,939.10 × 33,128.20
  4. Step 4: Simplify right side
    89,287.48x = 4,437,161,292.62
  5. Step 5: Solve for x
    x = 4,437,161,292.62/89,287.48
  6. Step 6: Final answer
    x = 49,695.22

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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.