Home / 128,690.01-192,969.19-53,789.72

Finding the Fourth Proportional to 128,690.01, 192,969.19 and 53,789.72

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Solution

The fourth proportional to 128,690.01, 192,969.19 and 53,789.72 is: 80,657.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,690.01 : 192,969.19 = 53,789.72 : x
  2. Step 2: Convert to fraction form
    128,690.01/192,969.19 = 53,789.72/x
  3. Step 3: Cross multiply
    128,690.01x = 192,969.19 × 53,789.72
  4. Step 4: Simplify right side
    128,690.01x = 10,379,757,801.12
  5. Step 5: Solve for x
    x = 10,379,757,801.12/128,690.01
  6. Step 6: Final answer
    x = 80,657.06

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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.