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Finding the Fourth Proportional to 66,732.66, 92,091.33 and 42,859.53

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Solution

The fourth proportional to 66,732.66, 92,091.33 and 42,859.53 is: 59,146.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,732.66 : 92,091.33 = 42,859.53 : x
  2. Step 2: Convert to fraction form
    66,732.66/92,091.33 = 42,859.53/x
  3. Step 3: Cross multiply
    66,732.66x = 92,091.33 × 42,859.53
  4. Step 4: Simplify right side
    66,732.66x = 3,946,991,120.87
  5. Step 5: Solve for x
    x = 3,946,991,120.87/66,732.66
  6. Step 6: Final answer
    x = 59,146.32

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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.