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Finding the Fourth Proportional to 239,286.60, 358,820.15 and 81,450.81

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Solution

The fourth proportional to 239,286.60, 358,820.15 and 81,450.81 is: 122,138.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,286.60 : 358,820.15 = 81,450.81 : x
  2. Step 2: Convert to fraction form
    239,286.60/358,820.15 = 81,450.81/x
  3. Step 3: Cross multiply
    239,286.60x = 358,820.15 × 81,450.81
  4. Step 4: Simplify right side
    239,286.60x = 29,226,191,454.57
  5. Step 5: Solve for x
    x = 29,226,191,454.57/239,286.60
  6. Step 6: Final answer
    x = 122,138.86

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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.