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Finding the Fourth Proportional to 251,599.50, 347,207.31 and 138,422.25

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Solution

The fourth proportional to 251,599.50, 347,207.31 and 138,422.25 is: 191,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,599.50 : 347,207.31 = 138,422.25 : x
  2. Step 2: Convert to fraction form
    251,599.50/347,207.31 = 138,422.25/x
  3. Step 3: Cross multiply
    251,599.50x = 347,207.31 × 138,422.25
  4. Step 4: Simplify right side
    251,599.50x = 48,061,217,066.65
  5. Step 5: Solve for x
    x = 48,061,217,066.65/251,599.50
  6. Step 6: Final answer
    x = 191,022.71

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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.