Home / 138,106.74-207,190.44-81,998.04

Finding the Fourth Proportional to 138,106.74, 207,190.44 and 81,998.04

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Solution

The fourth proportional to 138,106.74, 207,190.44 and 81,998.04 is: 123,015.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,106.74 : 207,190.44 = 81,998.04 : x
  2. Step 2: Convert to fraction form
    138,106.74/207,190.44 = 81,998.04/x
  3. Step 3: Cross multiply
    138,106.74x = 207,190.44 × 81,998.04
  4. Step 4: Simplify right side
    138,106.74x = 16,989,209,986.74
  5. Step 5: Solve for x
    x = 16,989,209,986.74/138,106.74
  6. Step 6: Final answer
    x = 123,015.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.