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Finding the Fourth Proportional to 161,861.20, 243,310.20 and 115,435.60

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Solution

The fourth proportional to 161,861.20, 243,310.20 and 115,435.60 is: 173,523.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,861.20 : 243,310.20 = 115,435.60 : x
  2. Step 2: Convert to fraction form
    161,861.20/243,310.20 = 115,435.60/x
  3. Step 3: Cross multiply
    161,861.20x = 243,310.20 × 115,435.60
  4. Step 4: Simplify right side
    161,861.20x = 28,086,658,923.12
  5. Step 5: Solve for x
    x = 28,086,658,923.12/161,861.20
  6. Step 6: Final answer
    x = 173,523.11

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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.