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Finding the Fourth Proportional to 79,388.91, 109,557.16 and 43,579.22

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Solution

The fourth proportional to 79,388.91, 109,557.16 and 43,579.22 is: 60,139.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,388.91 : 109,557.16 = 43,579.22 : x
  2. Step 2: Convert to fraction form
    79,388.91/109,557.16 = 43,579.22/x
  3. Step 3: Cross multiply
    79,388.91x = 109,557.16 × 43,579.22
  4. Step 4: Simplify right side
    79,388.91x = 4,774,414,921.48
  5. Step 5: Solve for x
    x = 4,774,414,921.48/79,388.91
  6. Step 6: Final answer
    x = 60,139.57

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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.