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Finding the Fourth Proportional to 78,807.44, 108,711.24 and 50,481.20

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Solution

The fourth proportional to 78,807.44, 108,711.24 and 50,481.20 is: 69,636.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807.44 : 108,711.24 = 50,481.20 : x
  2. Step 2: Convert to fraction form
    78,807.44/108,711.24 = 50,481.20/x
  3. Step 3: Cross multiply
    78,807.44x = 108,711.24 × 50,481.20
  4. Step 4: Simplify right side
    78,807.44x = 5,487,873,848.69
  5. Step 5: Solve for x
    x = 5,487,873,848.69/78,807.44
  6. Step 6: Final answer
    x = 69,636.49

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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.