Home / 128,621.31-192,939.25-39,887.43

Finding the Fourth Proportional to 128,621.31, 192,939.25 and 39,887.43

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Solution

The fourth proportional to 128,621.31, 192,939.25 and 39,887.43 is: 59,833.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.31 : 192,939.25 = 39,887.43 : x
  2. Step 2: Convert to fraction form
    128,621.31/192,939.25 = 39,887.43/x
  3. Step 3: Cross multiply
    128,621.31x = 192,939.25 × 39,887.43
  4. Step 4: Simplify right side
    128,621.31x = 7,695,850,728.91
  5. Step 5: Solve for x
    x = 7,695,850,728.91/128,621.31
  6. Step 6: Final answer
    x = 59,833.40

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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.