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Finding the Fourth Proportional to 125,998.20, 189,143.10 and 72,732.60

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Solution

The fourth proportional to 125,998.20, 189,143.10 and 72,732.60 is: 109,183.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,998.20 : 189,143.10 = 72,732.60 : x
  2. Step 2: Convert to fraction form
    125,998.20/189,143.10 = 72,732.60/x
  3. Step 3: Cross multiply
    125,998.20x = 189,143.10 × 72,732.60
  4. Step 4: Simplify right side
    125,998.20x = 13,756,869,435.06
  5. Step 5: Solve for x
    x = 13,756,869,435.06/125,998.20
  6. Step 6: Final answer
    x = 109,183.06

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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.