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Finding the Fourth Proportional to 251,865, 347,573.70 and 138,687.48

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Solution

The fourth proportional to 251,865, 347,573.70 and 138,687.48 is: 191,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,865 : 347,573.70 = 138,687.48 : x
  2. Step 2: Convert to fraction form
    251,865/347,573.70 = 138,687.48/x
  3. Step 3: Cross multiply
    251,865x = 347,573.70 × 138,687.48
  4. Step 4: Simplify right side
    251,865x = 48,204,120,567.28
  5. Step 5: Solve for x
    x = 48,204,120,567.28/251,865
  6. Step 6: Final answer
    x = 191,388.72

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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.