Home / 128,685.52-177,596.07-82,786.15

Finding the Fourth Proportional to 128,685.52, 177,596.07 and 82,786.15

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Solution

The fourth proportional to 128,685.52, 177,596.07 and 82,786.15 is: 114,251.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,685.52 : 177,596.07 = 82,786.15 : x
  2. Step 2: Convert to fraction form
    128,685.52/177,596.07 = 82,786.15/x
  3. Step 3: Cross multiply
    128,685.52x = 177,596.07 × 82,786.15
  4. Step 4: Simplify right side
    128,685.52x = 14,702,494,002.45
  5. Step 5: Solve for x
    x = 14,702,494,002.45/128,685.52
  6. Step 6: Final answer
    x = 114,251.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.