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Finding the Fourth Proportional to 65,611.38, 90,545.67 and 61,598.37

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Solution

The fourth proportional to 65,611.38, 90,545.67 and 61,598.37 is: 85,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,611.38 : 90,545.67 = 61,598.37 : x
  2. Step 2: Convert to fraction form
    65,611.38/90,545.67 = 61,598.37/x
  3. Step 3: Cross multiply
    65,611.38x = 90,545.67 × 61,598.37
  4. Step 4: Simplify right side
    65,611.38x = 5,577,465,682.56
  5. Step 5: Solve for x
    x = 5,577,465,682.56/65,611.38
  6. Step 6: Final answer
    x = 85,007.60

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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.