Home / 138,212.07-207,186.75-54,026.21

Finding the Fourth Proportional to 138,212.07, 207,186.75 and 54,026.21

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Solution

The fourth proportional to 138,212.07, 207,186.75 and 54,026.21 is: 80,987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,212.07 : 207,186.75 = 54,026.21 : x
  2. Step 2: Convert to fraction form
    138,212.07/207,186.75 = 54,026.21/x
  3. Step 3: Cross multiply
    138,212.07x = 207,186.75 × 54,026.21
  4. Step 4: Simplify right side
    138,212.07x = 11,193,513,828.78
  5. Step 5: Solve for x
    x = 11,193,513,828.78/138,212.07
  6. Step 6: Final answer
    x = 80,987.96

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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.