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Finding the Fourth Proportional to 159,768.70, 239,406.68 and 78,622.56

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Solution

The fourth proportional to 159,768.70, 239,406.68 and 78,622.56 is: 117,812.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,768.70 : 239,406.68 = 78,622.56 : x
  2. Step 2: Convert to fraction form
    159,768.70/239,406.68 = 78,622.56/x
  3. Step 3: Cross multiply
    159,768.70x = 239,406.68 × 78,622.56
  4. Step 4: Simplify right side
    159,768.70x = 18,822,766,062.70
  5. Step 5: Solve for x
    x = 18,822,766,062.70/159,768.70
  6. Step 6: Final answer
    x = 117,812.60

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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.