Home / 138,964.05-191,765.39-78,533.37

Finding the Fourth Proportional to 138,964.05, 191,765.39 and 78,533.37

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Solution

The fourth proportional to 138,964.05, 191,765.39 and 78,533.37 is: 108,373.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,964.05 : 191,765.39 = 78,533.37 : x
  2. Step 2: Convert to fraction form
    138,964.05/191,765.39 = 78,533.37/x
  3. Step 3: Cross multiply
    138,964.05x = 191,765.39 × 78,533.37
  4. Step 4: Simplify right side
    138,964.05x = 15,059,981,933.40
  5. Step 5: Solve for x
    x = 15,059,981,933.40/138,964.05
  6. Step 6: Final answer
    x = 108,373.22

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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.