Home / 128,286.11-177,019.49-70,917.71

Finding the Fourth Proportional to 128,286.11, 177,019.49 and 70,917.71

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Solution

The fourth proportional to 128,286.11, 177,019.49 and 70,917.71 is: 97,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,286.11 : 177,019.49 = 70,917.71 : x
  2. Step 2: Convert to fraction form
    128,286.11/177,019.49 = 70,917.71/x
  3. Step 3: Cross multiply
    128,286.11x = 177,019.49 × 70,917.71
  4. Step 4: Simplify right side
    128,286.11x = 12,553,815,616.48
  5. Step 5: Solve for x
    x = 12,553,815,616.48/128,286.11
  6. Step 6: Final answer
    x = 97,857.95

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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.