Home / 133,218.30-199,936.80-128,844.30

Finding the Fourth Proportional to 133,218.30, 199,936.80 and 128,844.30

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Solution

The fourth proportional to 133,218.30, 199,936.80 and 128,844.30 is: 193,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,218.30 : 199,936.80 = 128,844.30 : x
  2. Step 2: Convert to fraction form
    133,218.30/199,936.80 = 128,844.30/x
  3. Step 3: Cross multiply
    133,218.30x = 199,936.80 × 128,844.30
  4. Step 4: Simplify right side
    133,218.30x = 25,760,717,040.24
  5. Step 5: Solve for x
    x = 25,760,717,040.24/133,218.30
  6. Step 6: Final answer
    x = 193,372.21

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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.