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Finding the Fourth Proportional to 79,307, 109,443.66 and 43,979

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Solution

The fourth proportional to 79,307, 109,443.66 and 43,979 is: 60,691.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,307 : 109,443.66 = 43,979 : x
  2. Step 2: Convert to fraction form
    79,307/109,443.66 = 43,979/x
  3. Step 3: Cross multiply
    79,307x = 109,443.66 × 43,979
  4. Step 4: Simplify right side
    79,307x = 4,813,222,723.14
  5. Step 5: Solve for x
    x = 4,813,222,723.14/79,307
  6. Step 6: Final answer
    x = 60,691.02

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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.