Home / 78,451.11-117,709.44-34,115.13

Finding the Fourth Proportional to 78,451.11, 117,709.44 and 34,115.13

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Solution

The fourth proportional to 78,451.11, 117,709.44 and 34,115.13 is: 51,186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,451.11 : 117,709.44 = 34,115.13 : x
  2. Step 2: Convert to fraction form
    78,451.11/117,709.44 = 34,115.13/x
  3. Step 3: Cross multiply
    78,451.11x = 117,709.44 × 34,115.13
  4. Step 4: Simplify right side
    78,451.11x = 4,015,672,847.83
  5. Step 5: Solve for x
    x = 4,015,672,847.83/78,451.11
  6. Step 6: Final answer
    x = 51,186.95

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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.