Home / 82,137.08-122,611.45-72,172.60

Finding the Fourth Proportional to 82,137.08, 122,611.45 and 72,172.60

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Solution

The fourth proportional to 82,137.08, 122,611.45 and 72,172.60 is: 107,736.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,137.08 : 122,611.45 = 72,172.60 : x
  2. Step 2: Convert to fraction form
    82,137.08/122,611.45 = 72,172.60/x
  3. Step 3: Cross multiply
    82,137.08x = 122,611.45 × 72,172.60
  4. Step 4: Simplify right side
    82,137.08x = 8,849,187,136.27
  5. Step 5: Solve for x
    x = 8,849,187,136.27/82,137.08
  6. Step 6: Final answer
    x = 107,736.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.