Home / 128,137.72-192,224.94-39,398.66

Finding the Fourth Proportional to 128,137.72, 192,224.94 and 39,398.66

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Solution

The fourth proportional to 128,137.72, 192,224.94 and 39,398.66 is: 59,103.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,137.72 : 192,224.94 = 39,398.66 : x
  2. Step 2: Convert to fraction form
    128,137.72/192,224.94 = 39,398.66/x
  3. Step 3: Cross multiply
    128,137.72x = 192,224.94 × 39,398.66
  4. Step 4: Simplify right side
    128,137.72x = 7,573,405,054.58
  5. Step 5: Solve for x
    x = 7,573,405,054.58/128,137.72
  6. Step 6: Final answer
    x = 59,103.64

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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.