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Finding the Fourth Proportional to 61,963.10, 85,509.60 and 33,668.78

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Solution

The fourth proportional to 61,963.10, 85,509.60 and 33,668.78 is: 46,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,963.10 : 85,509.60 = 33,668.78 : x
  2. Step 2: Convert to fraction form
    61,963.10/85,509.60 = 33,668.78/x
  3. Step 3: Cross multiply
    61,963.10x = 85,509.60 × 33,668.78
  4. Step 4: Simplify right side
    61,963.10x = 2,879,003,741.94
  5. Step 5: Solve for x
    x = 2,879,003,741.94/61,963.10
  6. Step 6: Final answer
    x = 46,463.20

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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.