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Finding the Fourth Proportional to 79,431.84, 109,612.44 and 43,619.72

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Solution

The fourth proportional to 79,431.84, 109,612.44 and 43,619.72 is: 60,193.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,431.84 : 109,612.44 = 43,619.72 : x
  2. Step 2: Convert to fraction form
    79,431.84/109,612.44 = 43,619.72/x
  3. Step 3: Cross multiply
    79,431.84x = 109,612.44 × 43,619.72
  4. Step 4: Simplify right side
    79,431.84x = 4,781,263,393.25
  5. Step 5: Solve for x
    x = 4,781,263,393.25/79,431.84
  6. Step 6: Final answer
    x = 60,193.29

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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.