Home / 138,971.84-208,736.69-82,921.32

Finding the Fourth Proportional to 138,971.84, 208,736.69 and 82,921.32

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Solution

The fourth proportional to 138,971.84, 208,736.69 and 82,921.32 is: 124,548.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,971.84 : 208,736.69 = 82,921.32 : x
  2. Step 2: Convert to fraction form
    138,971.84/208,736.69 = 82,921.32/x
  3. Step 3: Cross multiply
    138,971.84x = 208,736.69 × 82,921.32
  4. Step 4: Simplify right side
    138,971.84x = 17,308,721,452.62
  5. Step 5: Solve for x
    x = 17,308,721,452.62/138,971.84
  6. Step 6: Final answer
    x = 124,548.41

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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.