Home / 79,732.08-109,233.44-76,742.64

Finding the Fourth Proportional to 79,732.08, 109,233.44 and 76,742.64

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Solution

The fourth proportional to 79,732.08, 109,233.44 and 76,742.64 is: 105,137.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,732.08 : 109,233.44 = 76,742.64 : x
  2. Step 2: Convert to fraction form
    79,732.08/109,233.44 = 76,742.64/x
  3. Step 3: Cross multiply
    79,732.08x = 109,233.44 × 76,742.64
  4. Step 4: Simplify right side
    79,732.08x = 8,382,862,561.88
  5. Step 5: Solve for x
    x = 8,382,862,561.88/79,732.08
  6. Step 6: Final answer
    x = 105,137.89

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.