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Finding the Fourth Proportional to 251,887.44, 347,607 and 138,711

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Solution

The fourth proportional to 251,887.44, 347,607 and 138,711 is: 191,422.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,887.44 : 347,607 = 138,711 : x
  2. Step 2: Convert to fraction form
    251,887.44/347,607 = 138,711/x
  3. Step 3: Cross multiply
    251,887.44x = 347,607 × 138,711
  4. Step 4: Simplify right side
    251,887.44x = 48,216,914,577
  5. Step 5: Solve for x
    x = 48,216,914,577/251,887.44
  6. Step 6: Final answer
    x = 191,422.46

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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.