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Finding the Fourth Proportional to 159,858.80, 239,935.44 and 81,028.16

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Solution

The fourth proportional to 159,858.80, 239,935.44 and 81,028.16 is: 121,616.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,858.80 : 239,935.44 = 81,028.16 : x
  2. Step 2: Convert to fraction form
    159,858.80/239,935.44 = 81,028.16/x
  3. Step 3: Cross multiply
    159,858.80x = 239,935.44 × 81,028.16
  4. Step 4: Simplify right side
    159,858.80x = 19,441,527,221.99
  5. Step 5: Solve for x
    x = 19,441,527,221.99/159,858.80
  6. Step 6: Final answer
    x = 121,616.87

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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.