Home / 117,145.54-161,540.02-100,205.88

Finding the Fourth Proportional to 117,145.54, 161,540.02 and 100,205.88

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Solution

The fourth proportional to 117,145.54, 161,540.02 and 100,205.88 is: 138,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,145.54 : 161,540.02 = 100,205.88 : x
  2. Step 2: Convert to fraction form
    117,145.54/161,540.02 = 100,205.88/x
  3. Step 3: Cross multiply
    117,145.54x = 161,540.02 × 100,205.88
  4. Step 4: Simplify right side
    117,145.54x = 16,187,259,859.32
  5. Step 5: Solve for x
    x = 16,187,259,859.32/117,145.54
  6. Step 6: Final answer
    x = 138,180.76

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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.