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Finding the Fourth Proportional to 218,793.40, 328,190.10 and 71,049.40

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Solution

The fourth proportional to 218,793.40, 328,190.10 and 71,049.40 is: 106,574.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,793.40 : 328,190.10 = 71,049.40 : x
  2. Step 2: Convert to fraction form
    218,793.40/328,190.10 = 71,049.40/x
  3. Step 3: Cross multiply
    218,793.40x = 328,190.10 × 71,049.40
  4. Step 4: Simplify right side
    218,793.40x = 23,317,709,690.94
  5. Step 5: Solve for x
    x = 23,317,709,690.94/218,793.40
  6. Step 6: Final answer
    x = 106,574.10

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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.