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Finding the Fourth Proportional to 77,078.40, 115,540.80 and 35,452.80

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Solution

The fourth proportional to 77,078.40, 115,540.80 and 35,452.80 is: 53,143.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,078.40 : 115,540.80 = 35,452.80 : x
  2. Step 2: Convert to fraction form
    77,078.40/115,540.80 = 35,452.80/x
  3. Step 3: Cross multiply
    77,078.40x = 115,540.80 × 35,452.80
  4. Step 4: Simplify right side
    77,078.40x = 4,096,244,874.24
  5. Step 5: Solve for x
    x = 4,096,244,874.24/77,078.40
  6. Step 6: Final answer
    x = 53,143.88

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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.