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Finding the Fourth Proportional to 159,859.80, 239,936.94 and 81,029.16

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Solution

The fourth proportional to 159,859.80, 239,936.94 and 81,029.16 is: 121,618.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,859.80 : 239,936.94 = 81,029.16 : x
  2. Step 2: Convert to fraction form
    159,859.80/239,936.94 = 81,029.16/x
  3. Step 3: Cross multiply
    159,859.80x = 239,936.94 × 81,029.16
  4. Step 4: Simplify right side
    159,859.80x = 19,441,888,701.17
  5. Step 5: Solve for x
    x = 19,441,888,701.17/159,859.80
  6. Step 6: Final answer
    x = 121,618.37

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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.