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Finding the Fourth Proportional to 78,648.89, 108,559.19 and 53,512.97

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Solution

The fourth proportional to 78,648.89, 108,559.19 and 53,512.97 is: 73,864.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,648.89 : 108,559.19 = 53,512.97 : x
  2. Step 2: Convert to fraction form
    78,648.89/108,559.19 = 53,512.97/x
  3. Step 3: Cross multiply
    78,648.89x = 108,559.19 × 53,512.97
  4. Step 4: Simplify right side
    78,648.89x = 5,809,324,410.13
  5. Step 5: Solve for x
    x = 5,809,324,410.13/78,648.89
  6. Step 6: Final answer
    x = 73,864.04

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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.