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Finding the Fourth Proportional to 57,136.52, 78,795.60 and 39,199.88

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Solution

The fourth proportional to 57,136.52, 78,795.60 and 39,199.88 is: 54,059.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,136.52 : 78,795.60 = 39,199.88 : x
  2. Step 2: Convert to fraction form
    57,136.52/78,795.60 = 39,199.88/x
  3. Step 3: Cross multiply
    57,136.52x = 78,795.60 × 39,199.88
  4. Step 4: Simplify right side
    57,136.52x = 3,088,778,064.53
  5. Step 5: Solve for x
    x = 3,088,778,064.53/57,136.52
  6. Step 6: Final answer
    x = 54,059.61

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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.