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Finding the Fourth Proportional to 80,806.26, 121,044.16 and 65,866.62

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Solution

The fourth proportional to 80,806.26, 121,044.16 and 65,866.62 is: 98,665.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,806.26 : 121,044.16 = 65,866.62 : x
  2. Step 2: Convert to fraction form
    80,806.26/121,044.16 = 65,866.62/x
  3. Step 3: Cross multiply
    80,806.26x = 121,044.16 × 65,866.62
  4. Step 4: Simplify right side
    80,806.26x = 7,972,769,689.94
  5. Step 5: Solve for x
    x = 7,972,769,689.94/80,806.26
  6. Step 6: Final answer
    x = 98,665.25

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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.