Home / 123,990.03-171,137.62-76,286.09

Finding the Fourth Proportional to 123,990.03, 171,137.62 and 76,286.09

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Solution

The fourth proportional to 123,990.03, 171,137.62 and 76,286.09 is: 105,294.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,990.03 : 171,137.62 = 76,286.09 : x
  2. Step 2: Convert to fraction form
    123,990.03/171,137.62 = 76,286.09/x
  3. Step 3: Cross multiply
    123,990.03x = 171,137.62 × 76,286.09
  4. Step 4: Simplify right side
    123,990.03x = 13,055,419,881.71
  5. Step 5: Solve for x
    x = 13,055,419,881.71/123,990.03
  6. Step 6: Final answer
    x = 105,294.11

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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.