Home / 82,137.08-122,611.46-72,172.58

Finding the Fourth Proportional to 82,137.08, 122,611.46 and 72,172.58

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Solution

The fourth proportional to 82,137.08, 122,611.46 and 72,172.58 is: 107,736.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,137.08 : 122,611.46 = 72,172.58 : x
  2. Step 2: Convert to fraction form
    82,137.08/122,611.46 = 72,172.58/x
  3. Step 3: Cross multiply
    82,137.08x = 122,611.46 × 72,172.58
  4. Step 4: Simplify right side
    82,137.08x = 8,849,185,405.77
  5. Step 5: Solve for x
    x = 8,849,185,405.77/82,137.08
  6. Step 6: Final answer
    x = 107,736.79

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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.