Home / 388,121.36-581,997.69-135,371.16

Finding the Fourth Proportional to 388,121.36, 581,997.69 and 135,371.16

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Solution

The fourth proportional to 388,121.36, 581,997.69 and 135,371.16 is: 202,992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,121.36 : 581,997.69 = 135,371.16 : x
  2. Step 2: Convert to fraction form
    388,121.36/581,997.69 = 135,371.16/x
  3. Step 3: Cross multiply
    388,121.36x = 581,997.69 × 135,371.16
  4. Step 4: Simplify right side
    388,121.36x = 78,785,702,412.62
  5. Step 5: Solve for x
    x = 78,785,702,412.62/388,121.36
  6. Step 6: Final answer
    x = 202,992.44

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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.