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Finding the Fourth Proportional to 251,907.64, 347,631.90 and 138,730.36

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Solution

The fourth proportional to 251,907.64, 347,631.90 and 138,730.36 is: 191,447.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,907.64 : 347,631.90 = 138,730.36 : x
  2. Step 2: Convert to fraction form
    251,907.64/347,631.90 = 138,730.36/x
  3. Step 3: Cross multiply
    251,907.64x = 347,631.90 × 138,730.36
  4. Step 4: Simplify right side
    251,907.64x = 48,227,098,634.48
  5. Step 5: Solve for x
    x = 48,227,098,634.48/251,907.64
  6. Step 6: Final answer
    x = 191,447.54

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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.