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Finding the Fourth Proportional to 61,771.82, 85,200.05 and 39,114.50

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Solution

The fourth proportional to 61,771.82, 85,200.05 and 39,114.50 is: 53,949.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,771.82 : 85,200.05 = 39,114.50 : x
  2. Step 2: Convert to fraction form
    61,771.82/85,200.05 = 39,114.50/x
  3. Step 3: Cross multiply
    61,771.82x = 85,200.05 × 39,114.50
  4. Step 4: Simplify right side
    61,771.82x = 3,332,557,027.51
  5. Step 5: Solve for x
    x = 3,332,557,027.51/61,771.82
  6. Step 6: Final answer
    x = 53,949.48

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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.