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Finding the Fourth Proportional to 158,625, 218,921.94 and 91,557

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Solution

The fourth proportional to 158,625, 218,921.94 and 91,557 is: 126,359.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,625 : 218,921.94 = 91,557 : x
  2. Step 2: Convert to fraction form
    158,625/218,921.94 = 91,557/x
  3. Step 3: Cross multiply
    158,625x = 218,921.94 × 91,557
  4. Step 4: Simplify right side
    158,625x = 20,043,836,060.58
  5. Step 5: Solve for x
    x = 20,043,836,060.58/158,625
  6. Step 6: Final answer
    x = 126,359.88

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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.