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Finding the Fourth Proportional to 61,795.31, 85,286.63 and 39,136.41

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Solution

The fourth proportional to 61,795.31, 85,286.63 and 39,136.41 is: 54,014.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,795.31 : 85,286.63 = 39,136.41 : x
  2. Step 2: Convert to fraction form
    61,795.31/85,286.63 = 39,136.41/x
  3. Step 3: Cross multiply
    61,795.31x = 85,286.63 × 39,136.41
  4. Step 4: Simplify right side
    61,795.31x = 3,337,812,323.52
  5. Step 5: Solve for x
    x = 3,337,812,323.52/61,795.31
  6. Step 6: Final answer
    x = 54,014.01

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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.