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Finding the Fourth Proportional to 253,191.74, 349,390.46 and 138,447.61

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Solution

The fourth proportional to 253,191.74, 349,390.46 and 138,447.61 is: 191,049.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,191.74 : 349,390.46 = 138,447.61 : x
  2. Step 2: Convert to fraction form
    253,191.74/349,390.46 = 138,447.61/x
  3. Step 3: Cross multiply
    253,191.74x = 349,390.46 × 138,447.61
  4. Step 4: Simplify right side
    253,191.74x = 48,372,273,616.44
  5. Step 5: Solve for x
    x = 48,372,273,616.44/253,191.74
  6. Step 6: Final answer
    x = 191,049.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.