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Finding the Fourth Proportional to 251,911.78, 347,622.26 and 138,734.54

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Solution

The fourth proportional to 251,911.78, 347,622.26 and 138,734.54 is: 191,444.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,911.78 : 347,622.26 = 138,734.54 : x
  2. Step 2: Convert to fraction form
    251,911.78/347,622.26 = 138,734.54/x
  3. Step 3: Cross multiply
    251,911.78x = 347,622.26 × 138,734.54
  4. Step 4: Simplify right side
    251,911.78x = 48,227,214,334.86
  5. Step 5: Solve for x
    x = 48,227,214,334.86/251,911.78
  6. Step 6: Final answer
    x = 191,444.86

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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.