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Finding the Fourth Proportional to 128,640.75, 192,926.25 and 53,745.23

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Solution

The fourth proportional to 128,640.75, 192,926.25 and 53,745.23 is: 80,603.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,640.75 : 192,926.25 = 53,745.23 : x
  2. Step 2: Convert to fraction form
    128,640.75/192,926.25 = 53,745.23/x
  3. Step 3: Cross multiply
    128,640.75x = 192,926.25 × 53,745.23
  4. Step 4: Simplify right side
    128,640.75x = 10,368,864,714.66
  5. Step 5: Solve for x
    x = 10,368,864,714.66/128,640.75
  6. Step 6: Final answer
    x = 80,603.27

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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.