Home / 79,679.72-109,811.54-74,623.64

Finding the Fourth Proportional to 79,679.72, 109,811.54 and 74,623.64

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Solution

The fourth proportional to 79,679.72, 109,811.54 and 74,623.64 is: 102,843.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,679.72 : 109,811.54 = 74,623.64 : x
  2. Step 2: Convert to fraction form
    79,679.72/109,811.54 = 74,623.64/x
  3. Step 3: Cross multiply
    79,679.72x = 109,811.54 × 74,623.64
  4. Step 4: Simplify right side
    79,679.72x = 8,194,536,828.81
  5. Step 5: Solve for x
    x = 8,194,536,828.81/79,679.72
  6. Step 6: Final answer
    x = 102,843.44

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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.