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Finding the Fourth Proportional to 79,171.68, 109,193.22 and 61,314.96

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Solution

The fourth proportional to 79,171.68, 109,193.22 and 61,314.96 is: 84,565.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,171.68 : 109,193.22 = 61,314.96 : x
  2. Step 2: Convert to fraction form
    79,171.68/109,193.22 = 61,314.96/x
  3. Step 3: Cross multiply
    79,171.68x = 109,193.22 × 61,314.96
  4. Step 4: Simplify right side
    79,171.68x = 6,695,177,916.57
  5. Step 5: Solve for x
    x = 6,695,177,916.57/79,171.68
  6. Step 6: Final answer
    x = 84,565.31

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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.