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Finding the Fourth Proportional to 63,136.87, 87,137.27 and 40,168.81

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Solution

The fourth proportional to 63,136.87, 87,137.27 and 40,168.81 is: 55,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,136.87 : 87,137.27 = 40,168.81 : x
  2. Step 2: Convert to fraction form
    63,136.87/87,137.27 = 40,168.81/x
  3. Step 3: Cross multiply
    63,136.87x = 87,137.27 × 40,168.81
  4. Step 4: Simplify right side
    63,136.87x = 3,500,200,501.26
  5. Step 5: Solve for x
    x = 3,500,200,501.26/63,136.87
  6. Step 6: Final answer
    x = 55,438.30

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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.