Home / 123,989.03-171,136.24-76,285.09

Finding the Fourth Proportional to 123,989.03, 171,136.24 and 76,285.09

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Solution

The fourth proportional to 123,989.03, 171,136.24 and 76,285.09 is: 105,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,989.03 : 171,136.24 = 76,285.09 : x
  2. Step 2: Convert to fraction form
    123,989.03/171,136.24 = 76,285.09/x
  3. Step 3: Cross multiply
    123,989.03x = 171,136.24 × 76,285.09
  4. Step 4: Simplify right side
    123,989.03x = 13,055,143,922.97
  5. Step 5: Solve for x
    x = 13,055,143,922.97/123,989.03
  6. Step 6: Final answer
    x = 105,292.73

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1.5x scale

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.