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Finding the Fourth Proportional to 247,310.70, 370,674.45 and 128,921.10

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Solution

The fourth proportional to 247,310.70, 370,674.45 and 128,921.10 is: 193,229.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,310.70 : 370,674.45 = 128,921.10 : x
  2. Step 2: Convert to fraction form
    247,310.70/370,674.45 = 128,921.10/x
  3. Step 3: Cross multiply
    247,310.70x = 370,674.45 × 128,921.10
  4. Step 4: Simplify right side
    247,310.70x = 47,787,757,835.90
  5. Step 5: Solve for x
    x = 47,787,757,835.90/247,310.70
  6. Step 6: Final answer
    x = 193,229.64

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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.