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Finding the Fourth Proportional to 171,391.72, 256,640.22 and 137,929

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Solution

The fourth proportional to 171,391.72, 256,640.22 and 137,929 is: 206,533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,391.72 : 256,640.22 = 137,929 : x
  2. Step 2: Convert to fraction form
    171,391.72/256,640.22 = 137,929/x
  3. Step 3: Cross multiply
    171,391.72x = 256,640.22 × 137,929
  4. Step 4: Simplify right side
    171,391.72x = 35,398,128,904.38
  5. Step 5: Solve for x
    x = 35,398,128,904.38/171,391.72
  6. Step 6: Final answer
    x = 206,533.48

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1.5x scale

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.