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Finding the Fourth Proportional to 101,288.66, 151,835.61 and 68,018

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Solution

The fourth proportional to 101,288.66, 151,835.61 and 68,018 is: 101,961.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,288.66 : 151,835.61 = 68,018 : x
  2. Step 2: Convert to fraction form
    101,288.66/151,835.61 = 68,018/x
  3. Step 3: Cross multiply
    101,288.66x = 151,835.61 × 68,018
  4. Step 4: Simplify right side
    101,288.66x = 10,327,554,520.98
  5. Step 5: Solve for x
    x = 10,327,554,520.98/101,288.66
  6. Step 6: Final answer
    x = 101,961.61

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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.