Home / 138,433.92-207,509.04-105,083.40

Finding the Fourth Proportional to 138,433.92, 207,509.04 and 105,083.40

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Solution

The fourth proportional to 138,433.92, 207,509.04 and 105,083.40 is: 157,517.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,433.92 : 207,509.04 = 105,083.40 : x
  2. Step 2: Convert to fraction form
    138,433.92/207,509.04 = 105,083.40/x
  3. Step 3: Cross multiply
    138,433.92x = 207,509.04 × 105,083.40
  4. Step 4: Simplify right side
    138,433.92x = 21,805,755,453.94
  5. Step 5: Solve for x
    x = 21,805,755,453.94/138,433.92
  6. Step 6: Final answer
    x = 157,517.43

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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.