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Finding the Fourth Proportional to 138,481.59, 207,722.37 and 79,275.54

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Solution

The fourth proportional to 138,481.59, 207,722.37 and 79,275.54 is: 118,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,481.59 : 207,722.37 = 79,275.54 : x
  2. Step 2: Convert to fraction form
    138,481.59/207,722.37 = 79,275.54/x
  3. Step 3: Cross multiply
    138,481.59x = 207,722.37 × 79,275.54
  4. Step 4: Simplify right side
    138,481.59x = 16,467,303,051.83
  5. Step 5: Solve for x
    x = 16,467,303,051.83/138,481.59
  6. Step 6: Final answer
    x = 118,913.30

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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.