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Finding the Fourth Proportional to 192,708.20, 289,047.90 and 80,359.40

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Solution

The fourth proportional to 192,708.20, 289,047.90 and 80,359.40 is: 120,533.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,708.20 : 289,047.90 = 80,359.40 : x
  2. Step 2: Convert to fraction form
    192,708.20/289,047.90 = 80,359.40/x
  3. Step 3: Cross multiply
    192,708.20x = 289,047.90 × 80,359.40
  4. Step 4: Simplify right side
    192,708.20x = 23,227,715,815.26
  5. Step 5: Solve for x
    x = 23,227,715,815.26/192,708.20
  6. Step 6: Final answer
    x = 120,533.10

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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.