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Finding the Fourth Proportional to 65,511.86, 90,409.57 and 36,840.55

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Solution

The fourth proportional to 65,511.86, 90,409.57 and 36,840.55 is: 50,841.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,511.86 : 90,409.57 = 36,840.55 : x
  2. Step 2: Convert to fraction form
    65,511.86/90,409.57 = 36,840.55/x
  3. Step 3: Cross multiply
    65,511.86x = 90,409.57 × 36,840.55
  4. Step 4: Simplify right side
    65,511.86x = 3,330,737,832.02
  5. Step 5: Solve for x
    x = 3,330,737,832.02/65,511.86
  6. Step 6: Final answer
    x = 50,841.75

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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.