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Finding the Fourth Proportional to 89,979.76, 134,969.46 and 36,694

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Solution

The fourth proportional to 89,979.76, 134,969.46 and 36,694 is: 55,040.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,979.76 : 134,969.46 = 36,694 : x
  2. Step 2: Convert to fraction form
    89,979.76/134,969.46 = 36,694/x
  3. Step 3: Cross multiply
    89,979.76x = 134,969.46 × 36,694
  4. Step 4: Simplify right side
    89,979.76x = 4,952,569,365.24
  5. Step 5: Solve for x
    x = 4,952,569,365.24/89,979.76
  6. Step 6: Final answer
    x = 55,040.93

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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.