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Finding the Fourth Proportional to 57,138.30, 85,709.88 and 17,696.16

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Solution

The fourth proportional to 57,138.30, 85,709.88 and 17,696.16 is: 26,544.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.30 : 85,709.88 = 17,696.16 : x
  2. Step 2: Convert to fraction form
    57,138.30/85,709.88 = 17,696.16/x
  3. Step 3: Cross multiply
    57,138.30x = 85,709.88 × 17,696.16
  4. Step 4: Simplify right side
    57,138.30x = 1,516,735,750.06
  5. Step 5: Solve for x
    x = 1,516,735,750.06/57,138.30
  6. Step 6: Final answer
    x = 26,544.99

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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.