Home / 79,679.23-109,719.97-77,911.07

Finding the Fourth Proportional to 79,679.23, 109,719.97 and 77,911.07

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Solution

The fourth proportional to 79,679.23, 109,719.97 and 77,911.07 is: 107,285.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,679.23 : 109,719.97 = 77,911.07 : x
  2. Step 2: Convert to fraction form
    79,679.23/109,719.97 = 77,911.07/x
  3. Step 3: Cross multiply
    79,679.23x = 109,719.97 × 77,911.07
  4. Step 4: Simplify right side
    79,679.23x = 8,548,399,519.69
  5. Step 5: Solve for x
    x = 8,548,399,519.69/79,679.23
  6. Step 6: Final answer
    x = 107,285.17

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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.