Home / 100,665.30-138,914.57-55,342.95

Finding the Fourth Proportional to 100,665.30, 138,914.57 and 55,342.95

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Solution

The fourth proportional to 100,665.30, 138,914.57 and 55,342.95 is: 76,371.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,665.30 : 138,914.57 = 55,342.95 : x
  2. Step 2: Convert to fraction form
    100,665.30/138,914.57 = 55,342.95/x
  3. Step 3: Cross multiply
    100,665.30x = 138,914.57 × 55,342.95
  4. Step 4: Simplify right side
    100,665.30x = 7,687,942,101.78
  5. Step 5: Solve for x
    x = 7,687,942,101.78/100,665.30
  6. Step 6: Final answer
    x = 76,371.32

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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.