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Finding the Fourth Proportional to 129,860.60, 194,790.90 and 103,616.60

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Solution

The fourth proportional to 129,860.60, 194,790.90 and 103,616.60 is: 155,424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,860.60 : 194,790.90 = 103,616.60 : x
  2. Step 2: Convert to fraction form
    129,860.60/194,790.90 = 103,616.60/x
  3. Step 3: Cross multiply
    129,860.60x = 194,790.90 × 103,616.60
  4. Step 4: Simplify right side
    129,860.60x = 20,183,570,768.94
  5. Step 5: Solve for x
    x = 20,183,570,768.94/129,860.60
  6. Step 6: Final answer
    x = 155,424.90

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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.