Home / 128,149.46-192,239.58-53,320.25

Finding the Fourth Proportional to 128,149.46, 192,239.58 and 53,320.25

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Solution

The fourth proportional to 128,149.46, 192,239.58 and 53,320.25 is: 79,986.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,149.46 : 192,239.58 = 53,320.25 : x
  2. Step 2: Convert to fraction form
    128,149.46/192,239.58 = 53,320.25/x
  3. Step 3: Cross multiply
    128,149.46x = 192,239.58 × 53,320.25
  4. Step 4: Simplify right side
    128,149.46x = 10,250,261,504.30
  5. Step 5: Solve for x
    x = 10,250,261,504.30/128,149.46
  6. Step 6: Final answer
    x = 79,986.77

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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.