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Finding the Fourth Proportional to 71,379.12, 106,537.38 and 61,848.84

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Solution

The fourth proportional to 71,379.12, 106,537.38 and 61,848.84 is: 92,312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.12 : 106,537.38 = 61,848.84 : x
  2. Step 2: Convert to fraction form
    71,379.12/106,537.38 = 61,848.84/x
  3. Step 3: Cross multiply
    71,379.12x = 106,537.38 × 61,848.84
  4. Step 4: Simplify right side
    71,379.12x = 6,589,213,369.64
  5. Step 5: Solve for x
    x = 6,589,213,369.64/71,379.12
  6. Step 6: Final answer
    x = 92,312.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.