Home / 138,965.78-191,757.44-78,536.36

Finding the Fourth Proportional to 138,965.78, 191,757.44 and 78,536.36

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Solution

The fourth proportional to 138,965.78, 191,757.44 and 78,536.36 is: 108,371.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,965.78 : 191,757.44 = 78,536.36 : x
  2. Step 2: Convert to fraction form
    138,965.78/191,757.44 = 78,536.36/x
  3. Step 3: Cross multiply
    138,965.78x = 191,757.44 × 78,536.36
  4. Step 4: Simplify right side
    138,965.78x = 15,059,931,340.52
  5. Step 5: Solve for x
    x = 15,059,931,340.52/138,965.78
  6. Step 6: Final answer
    x = 108,371.51

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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.