Home / 81,865.08-122,725.80-67,940.64

Finding the Fourth Proportional to 81,865.08, 122,725.80 and 67,940.64

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Solution

The fourth proportional to 81,865.08, 122,725.80 and 67,940.64 is: 101,851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,865.08 : 122,725.80 = 67,940.64 : x
  2. Step 2: Convert to fraction form
    81,865.08/122,725.80 = 67,940.64/x
  3. Step 3: Cross multiply
    81,865.08x = 122,725.80 × 67,940.64
  4. Step 4: Simplify right side
    81,865.08x = 8,338,069,396.51
  5. Step 5: Solve for x
    x = 8,338,069,396.51/81,865.08
  6. Step 6: Final answer
    x = 101,851.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.