Home / 117,145.37-161,539.79-100,205.69

Finding the Fourth Proportional to 117,145.37, 161,539.79 and 100,205.69

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Solution

The fourth proportional to 117,145.37, 161,539.79 and 100,205.69 is: 138,180.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,145.37 : 161,539.79 = 100,205.69 : x
  2. Step 2: Convert to fraction form
    117,145.37/161,539.79 = 100,205.69/x
  3. Step 3: Cross multiply
    117,145.37x = 161,539.79 × 100,205.69
  4. Step 4: Simplify right side
    117,145.37x = 16,187,204,810.68
  5. Step 5: Solve for x
    x = 16,187,204,810.68/117,145.37
  6. Step 6: Final answer
    x = 138,180.50

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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.