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Finding the Fourth Proportional to 65,911.55, 90,957.91 and 35,696.87

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Solution

The fourth proportional to 65,911.55, 90,957.91 and 35,696.87 is: 49,261.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,911.55 : 90,957.91 = 35,696.87 : x
  2. Step 2: Convert to fraction form
    65,911.55/90,957.91 = 35,696.87/x
  3. Step 3: Cross multiply
    65,911.55x = 90,957.91 × 35,696.87
  4. Step 4: Simplify right side
    65,911.55x = 3,246,912,732.05
  5. Step 5: Solve for x
    x = 3,246,912,732.05/65,911.55
  6. Step 6: Final answer
    x = 49,261.67

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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.