Home / 128,800.08-193,246.11-78,301.85

Finding the Fourth Proportional to 128,800.08, 193,246.11 and 78,301.85

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Solution

The fourth proportional to 128,800.08, 193,246.11 and 78,301.85 is: 117,480.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,800.08 : 193,246.11 = 78,301.85 : x
  2. Step 2: Convert to fraction form
    128,800.08/193,246.11 = 78,301.85/x
  3. Step 3: Cross multiply
    128,800.08x = 193,246.11 × 78,301.85
  4. Step 4: Simplify right side
    128,800.08x = 15,131,526,952.07
  5. Step 5: Solve for x
    x = 15,131,526,952.07/128,800.08
  6. Step 6: Final answer
    x = 117,480.73

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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.