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Finding the Fourth Proportional to 129,622.60, 194,433.90 and 103,378.60

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Solution

The fourth proportional to 129,622.60, 194,433.90 and 103,378.60 is: 155,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,622.60 : 194,433.90 = 103,378.60 : x
  2. Step 2: Convert to fraction form
    129,622.60/194,433.90 = 103,378.60/x
  3. Step 3: Cross multiply
    129,622.60x = 194,433.90 × 103,378.60
  4. Step 4: Simplify right side
    129,622.60x = 20,100,304,374.54
  5. Step 5: Solve for x
    x = 20,100,304,374.54/129,622.60
  6. Step 6: Final answer
    x = 155,067.90

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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.