Home / 138,960.41-208,422.15-39,128.38

Finding the Fourth Proportional to 138,960.41, 208,422.15 and 39,128.38

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Solution

The fourth proportional to 138,960.41, 208,422.15 and 39,128.38 is: 58,687.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,960.41 : 208,422.15 = 39,128.38 : x
  2. Step 2: Convert to fraction form
    138,960.41/208,422.15 = 39,128.38/x
  3. Step 3: Cross multiply
    138,960.41x = 208,422.15 × 39,128.38
  4. Step 4: Simplify right side
    138,960.41x = 8,155,221,085.62
  5. Step 5: Solve for x
    x = 8,155,221,085.62/138,960.41
  6. Step 6: Final answer
    x = 58,687.37

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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.