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Finding the Fourth Proportional to 243,634.70, 365,452.05 and 85,879.10

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Solution

The fourth proportional to 243,634.70, 365,452.05 and 85,879.10 is: 128,818.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,634.70 : 365,452.05 = 85,879.10 : x
  2. Step 2: Convert to fraction form
    243,634.70/365,452.05 = 85,879.10/x
  3. Step 3: Cross multiply
    243,634.70x = 365,452.05 × 85,879.10
  4. Step 4: Simplify right side
    243,634.70x = 31,384,693,147.16
  5. Step 5: Solve for x
    x = 31,384,693,147.16/243,634.70
  6. Step 6: Final answer
    x = 128,818.65

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Similar ratio
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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.