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Finding the Fourth Proportional to 192,379.10, 288,568.65 and 121,520.30

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Solution

The fourth proportional to 192,379.10, 288,568.65 and 121,520.30 is: 182,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,379.10 : 288,568.65 = 121,520.30 : x
  2. Step 2: Convert to fraction form
    192,379.10/288,568.65 = 121,520.30/x
  3. Step 3: Cross multiply
    192,379.10x = 288,568.65 × 121,520.30
  4. Step 4: Simplify right side
    192,379.10x = 35,066,948,918.60
  5. Step 5: Solve for x
    x = 35,066,948,918.60/192,379.10
  6. Step 6: Final answer
    x = 182,280.45

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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.