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Finding the Fourth Proportional to 67,322.76, 92,890.44 and 38,640.66

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Solution

The fourth proportional to 67,322.76, 92,890.44 and 38,640.66 is: 53,315.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,322.76 : 92,890.44 = 38,640.66 : x
  2. Step 2: Convert to fraction form
    67,322.76/92,890.44 = 38,640.66/x
  3. Step 3: Cross multiply
    67,322.76x = 92,890.44 × 38,640.66
  4. Step 4: Simplify right side
    67,322.76x = 3,589,347,909.29
  5. Step 5: Solve for x
    x = 3,589,347,909.29/67,322.76
  6. Step 6: Final answer
    x = 53,315.52

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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.