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Finding the Fourth Proportional to 79,079.73, 109,252.61 and 66,310.39

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Solution

The fourth proportional to 79,079.73, 109,252.61 and 66,310.39 is: 91,611.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,079.73 : 109,252.61 = 66,310.39 : x
  2. Step 2: Convert to fraction form
    79,079.73/109,252.61 = 66,310.39/x
  3. Step 3: Cross multiply
    79,079.73x = 109,252.61 × 66,310.39
  4. Step 4: Simplify right side
    79,079.73x = 7,244,583,070.26
  5. Step 5: Solve for x
    x = 7,244,583,070.26/79,079.73
  6. Step 6: Final answer
    x = 91,611.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.