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Finding the Fourth Proportional to 251,911.89, 347,654.16 and 138,734.64

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Solution

The fourth proportional to 251,911.89, 347,654.16 and 138,734.64 is: 191,462.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,911.89 : 347,654.16 = 138,734.64 : x
  2. Step 2: Convert to fraction form
    251,911.89/347,654.16 = 138,734.64/x
  3. Step 3: Cross multiply
    251,911.89x = 347,654.16 × 138,734.64
  4. Step 4: Simplify right side
    251,911.89x = 48,231,674,732.10
  5. Step 5: Solve for x
    x = 48,231,674,732.10/251,911.89
  6. Step 6: Final answer
    x = 191,462.48

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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.