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Finding the Fourth Proportional to 159,820.70, 239,621.70 and 75,621.20

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Solution

The fourth proportional to 159,820.70, 239,621.70 and 75,621.20 is: 113,380.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,820.70 : 239,621.70 = 75,621.20 : x
  2. Step 2: Convert to fraction form
    159,820.70/239,621.70 = 75,621.20/x
  3. Step 3: Cross multiply
    159,820.70x = 239,621.70 × 75,621.20
  4. Step 4: Simplify right side
    159,820.70x = 18,120,480,500.04
  5. Step 5: Solve for x
    x = 18,120,480,500.04/159,820.70
  6. Step 6: Final answer
    x = 113,380.06

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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.