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Finding the Fourth Proportional to 61,189.32, 84,452.82 and 39,986.76

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Solution

The fourth proportional to 61,189.32, 84,452.82 and 39,986.76 is: 55,189.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,189.32 : 84,452.82 = 39,986.76 : x
  2. Step 2: Convert to fraction form
    61,189.32/84,452.82 = 39,986.76/x
  3. Step 3: Cross multiply
    61,189.32x = 84,452.82 × 39,986.76
  4. Step 4: Simplify right side
    61,189.32x = 3,376,994,644.66
  5. Step 5: Solve for x
    x = 3,376,994,644.66/61,189.32
  6. Step 6: Final answer
    x = 55,189.28

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Double scale
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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.