Home / 137,639.17-206,391.93-80,728.57

Finding the Fourth Proportional to 137,639.17, 206,391.93 and 80,728.57

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Solution

The fourth proportional to 137,639.17, 206,391.93 and 80,728.57 is: 121,053.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,639.17 : 206,391.93 = 80,728.57 : x
  2. Step 2: Convert to fraction form
    137,639.17/206,391.93 = 80,728.57/x
  3. Step 3: Cross multiply
    137,639.17x = 206,391.93 × 80,728.57
  4. Step 4: Simplify right side
    137,639.17x = 16,661,725,368.44
  5. Step 5: Solve for x
    x = 16,661,725,368.44/137,639.17
  6. Step 6: Final answer
    x = 121,053.66

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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.