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Finding the Fourth Proportional to 78,959.56, 108,959.60 and 43,149.88

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Solution

The fourth proportional to 78,959.56, 108,959.60 and 43,149.88 is: 59,544.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.56 : 108,959.60 = 43,149.88 : x
  2. Step 2: Convert to fraction form
    78,959.56/108,959.60 = 43,149.88/x
  3. Step 3: Cross multiply
    78,959.56x = 108,959.60 × 43,149.88
  4. Step 4: Simplify right side
    78,959.56x = 4,701,593,664.85
  5. Step 5: Solve for x
    x = 4,701,593,664.85/78,959.56
  6. Step 6: Final answer
    x = 59,544.32

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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.