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Finding the Fourth Proportional to 251,971.70, 347,720.96 and 138,794.45

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Solution

The fourth proportional to 251,971.70, 347,720.96 and 138,794.45 is: 191,536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,971.70 : 347,720.96 = 138,794.45 : x
  2. Step 2: Convert to fraction form
    251,971.70/347,720.96 = 138,794.45/x
  3. Step 3: Cross multiply
    251,971.70x = 347,720.96 × 138,794.45
  4. Step 4: Simplify right side
    251,971.70x = 48,261,738,005.05
  5. Step 5: Solve for x
    x = 48,261,738,005.05/251,971.70
  6. Step 6: Final answer
    x = 191,536.35

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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.