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Finding the Fourth Proportional to 128,920.60, 193,311.24 and 50,013.64

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Solution

The fourth proportional to 128,920.60, 193,311.24 and 50,013.64 is: 74,993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,920.60 : 193,311.24 = 50,013.64 : x
  2. Step 2: Convert to fraction form
    128,920.60/193,311.24 = 50,013.64/x
  3. Step 3: Cross multiply
    128,920.60x = 193,311.24 × 50,013.64
  4. Step 4: Simplify right side
    128,920.60x = 9,668,198,765.31
  5. Step 5: Solve for x
    x = 9,668,198,765.31/128,920.60
  6. Step 6: Final answer
    x = 74,993.44

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1.5x scale

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.