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Finding the Fourth Proportional to 252,721.88, 378,859.44 and 103,087.34

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Solution

The fourth proportional to 252,721.88, 378,859.44 and 103,087.34 is: 154,539.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,721.88 : 378,859.44 = 103,087.34 : x
  2. Step 2: Convert to fraction form
    252,721.88/378,859.44 = 103,087.34/x
  3. Step 3: Cross multiply
    252,721.88x = 378,859.44 × 103,087.34
  4. Step 4: Simplify right side
    252,721.88x = 39,055,611,903.49
  5. Step 5: Solve for x
    x = 39,055,611,903.49/252,721.88
  6. Step 6: Final answer
    x = 154,539.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.