Home / 138,249.52-207,042.08-78,905.27

Finding the Fourth Proportional to 138,249.52, 207,042.08 and 78,905.27

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Solution

The fourth proportional to 138,249.52, 207,042.08 and 78,905.27 is: 118,168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,249.52 : 207,042.08 = 78,905.27 : x
  2. Step 2: Convert to fraction form
    138,249.52/207,042.08 = 78,905.27/x
  3. Step 3: Cross multiply
    138,249.52x = 207,042.08 × 78,905.27
  4. Step 4: Simplify right side
    138,249.52x = 16,336,711,346.84
  5. Step 5: Solve for x
    x = 16,336,711,346.84/138,249.52
  6. Step 6: Final answer
    x = 118,168.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.