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Finding the Fourth Proportional to 192,778.60, 289,211.10 and 74,439.40

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Solution

The fourth proportional to 192,778.60, 289,211.10 and 74,439.40 is: 111,675.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,778.60 : 289,211.10 = 74,439.40 : x
  2. Step 2: Convert to fraction form
    192,778.60/289,211.10 = 74,439.40/x
  3. Step 3: Cross multiply
    192,778.60x = 289,211.10 × 74,439.40
  4. Step 4: Simplify right side
    192,778.60x = 21,528,700,757.34
  5. Step 5: Solve for x
    x = 21,528,700,757.34/192,778.60
  6. Step 6: Final answer
    x = 111,675.78

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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.