Home / 138,438.05-207,674.37-54,187.34

Finding the Fourth Proportional to 138,438.05, 207,674.37 and 54,187.34

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Solution

The fourth proportional to 138,438.05, 207,674.37 and 54,187.34 is: 81,287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,438.05 : 207,674.37 = 54,187.34 : x
  2. Step 2: Convert to fraction form
    138,438.05/207,674.37 = 54,187.34/x
  3. Step 3: Cross multiply
    138,438.05x = 207,674.37 × 54,187.34
  4. Step 4: Simplify right side
    138,438.05x = 11,253,320,658.10
  5. Step 5: Solve for x
    x = 11,253,320,658.10/138,438.05
  6. Step 6: Final answer
    x = 81,287.78

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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.