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Finding the Fourth Proportional to 45,979.74, 68,989.05 and 19,696.86

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Solution

The fourth proportional to 45,979.74, 68,989.05 and 19,696.86 is: 29,553.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,979.74 : 68,989.05 = 19,696.86 : x
  2. Step 2: Convert to fraction form
    45,979.74/68,989.05 = 19,696.86/x
  3. Step 3: Cross multiply
    45,979.74x = 68,989.05 × 19,696.86
  4. Step 4: Simplify right side
    45,979.74x = 1,358,867,659.38
  5. Step 5: Solve for x
    x = 1,358,867,659.38/45,979.74
  6. Step 6: Final answer
    x = 29,553.62

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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.