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Finding the Fourth Proportional to 81,992.14, 122,797.50 and 79,150.94

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Solution

The fourth proportional to 81,992.14, 122,797.50 and 79,150.94 is: 118,542.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,992.14 : 122,797.50 = 79,150.94 : x
  2. Step 2: Convert to fraction form
    81,992.14/122,797.50 = 79,150.94/x
  3. Step 3: Cross multiply
    81,992.14x = 122,797.50 × 79,150.94
  4. Step 4: Simplify right side
    81,992.14x = 9,719,537,554.65
  5. Step 5: Solve for x
    x = 9,719,537,554.65/81,992.14
  6. Step 6: Final answer
    x = 118,542.31

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1.5x scale

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.