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Finding the Fourth Proportional to 78,370.96, 108,169.16 and 51,515.97

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Solution

The fourth proportional to 78,370.96, 108,169.16 and 51,515.97 is: 71,103.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.96 : 108,169.16 = 51,515.97 : x
  2. Step 2: Convert to fraction form
    78,370.96/108,169.16 = 51,515.97/x
  3. Step 3: Cross multiply
    78,370.96x = 108,169.16 × 51,515.97
  4. Step 4: Simplify right side
    78,370.96x = 5,572,438,538.27
  5. Step 5: Solve for x
    x = 5,572,438,538.27/78,370.96
  6. Step 6: Final answer
    x = 71,103.36

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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.