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Finding the Fourth Proportional to 256,718.70, 385,067.33 and 67,174.86

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Solution

The fourth proportional to 256,718.70, 385,067.33 and 67,174.86 is: 100,759.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,718.70 : 385,067.33 = 67,174.86 : x
  2. Step 2: Convert to fraction form
    256,718.70/385,067.33 = 67,174.86/x
  3. Step 3: Cross multiply
    256,718.70x = 385,067.33 × 67,174.86
  4. Step 4: Simplify right side
    256,718.70x = 25,866,843,647.45
  5. Step 5: Solve for x
    x = 25,866,843,647.45/256,718.70
  6. Step 6: Final answer
    x = 100,759.48

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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.