Home / 128,621.25-192,939.16-39,887.37

Finding the Fourth Proportional to 128,621.25, 192,939.16 and 39,887.37

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Solution

The fourth proportional to 128,621.25, 192,939.16 and 39,887.37 is: 59,833.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.25 : 192,939.16 = 39,887.37 : x
  2. Step 2: Convert to fraction form
    128,621.25/192,939.16 = 39,887.37/x
  3. Step 3: Cross multiply
    128,621.25x = 192,939.16 × 39,887.37
  4. Step 4: Simplify right side
    128,621.25x = 7,695,834,498.28
  5. Step 5: Solve for x
    x = 7,695,834,498.28/128,621.25
  6. Step 6: Final answer
    x = 59,833.31

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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.