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Finding the Fourth Proportional to 151,391.53, 208,919.34 and 83,406.94

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Solution

The fourth proportional to 151,391.53, 208,919.34 and 83,406.94 is: 115,101.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,391.53 : 208,919.34 = 83,406.94 : x
  2. Step 2: Convert to fraction form
    151,391.53/208,919.34 = 83,406.94/x
  3. Step 3: Cross multiply
    151,391.53x = 208,919.34 × 83,406.94
  4. Step 4: Simplify right side
    151,391.53x = 17,425,322,856.22
  5. Step 5: Solve for x
    x = 17,425,322,856.22/151,391.53
  6. Step 6: Final answer
    x = 115,101.04

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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.