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Finding the Fourth Proportional to 228,279.70, 342,419.55 and 103,620.70

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Solution

The fourth proportional to 228,279.70, 342,419.55 and 103,620.70 is: 155,431.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,279.70 : 342,419.55 = 103,620.70 : x
  2. Step 2: Convert to fraction form
    228,279.70/342,419.55 = 103,620.70/x
  3. Step 3: Cross multiply
    228,279.70x = 342,419.55 × 103,620.70
  4. Step 4: Simplify right side
    228,279.70x = 35,481,753,464.69
  5. Step 5: Solve for x
    x = 35,481,753,464.69/228,279.70
  6. Step 6: Final answer
    x = 155,431.05

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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.