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Finding the Fourth Proportional to 138,244.93, 207,367.31 and 79,039.09

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Solution

The fourth proportional to 138,244.93, 207,367.31 and 79,039.09 is: 118,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,244.93 : 207,367.31 = 79,039.09 : x
  2. Step 2: Convert to fraction form
    138,244.93/207,367.31 = 79,039.09/x
  3. Step 3: Cross multiply
    138,244.93x = 207,367.31 × 79,039.09
  4. Step 4: Simplify right side
    138,244.93x = 16,390,122,768.51
  5. Step 5: Solve for x
    x = 16,390,122,768.51/138,244.93
  6. Step 6: Final answer
    x = 118,558.58

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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.