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Finding the Fourth Proportional to 66,207.10, 99,310.65 and 61,347.10

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Solution

The fourth proportional to 66,207.10, 99,310.65 and 61,347.10 is: 92,020.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.10 : 99,310.65 = 61,347.10 : x
  2. Step 2: Convert to fraction form
    66,207.10/99,310.65 = 61,347.10/x
  3. Step 3: Cross multiply
    66,207.10x = 99,310.65 × 61,347.10
  4. Step 4: Simplify right side
    66,207.10x = 6,092,420,376.62
  5. Step 5: Solve for x
    x = 6,092,420,376.62/66,207.10
  6. Step 6: Final answer
    x = 92,020.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.