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Finding the Fourth Proportional to 251,711.42, 347,361.82 and 136,990.52

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Solution

The fourth proportional to 251,711.42, 347,361.82 and 136,990.52 is: 189,046.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,711.42 : 347,361.82 = 136,990.52 : x
  2. Step 2: Convert to fraction form
    251,711.42/347,361.82 = 136,990.52/x
  3. Step 3: Cross multiply
    251,711.42x = 347,361.82 × 136,990.52
  4. Step 4: Simplify right side
    251,711.42x = 47,585,274,270.66
  5. Step 5: Solve for x
    x = 47,585,274,270.66/251,711.42
  6. Step 6: Final answer
    x = 189,046.94

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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.