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Finding the Fourth Proportional to 128,371.17, 177,092.57 and 83,063.77

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Solution

The fourth proportional to 128,371.17, 177,092.57 and 83,063.77 is: 114,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.17 : 177,092.57 = 83,063.77 : x
  2. Step 2: Convert to fraction form
    128,371.17/177,092.57 = 83,063.77/x
  3. Step 3: Cross multiply
    128,371.17x = 177,092.57 × 83,063.77
  4. Step 4: Simplify right side
    128,371.17x = 14,709,975,435.04
  5. Step 5: Solve for x
    x = 14,709,975,435.04/128,371.17
  6. Step 6: Final answer
    x = 114,589.40

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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.