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Finding the Fourth Proportional to 61,136.72, 84,405.48 and 39,951.44

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Solution

The fourth proportional to 61,136.72, 84,405.48 and 39,951.44 is: 55,157.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,136.72 : 84,405.48 = 39,951.44 : x
  2. Step 2: Convert to fraction form
    61,136.72/84,405.48 = 39,951.44/x
  3. Step 3: Cross multiply
    61,136.72x = 84,405.48 × 39,951.44
  4. Step 4: Simplify right side
    61,136.72x = 3,372,120,469.89
  5. Step 5: Solve for x
    x = 3,372,120,469.89/61,136.72
  6. Step 6: Final answer
    x = 55,157.04

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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.