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Finding the Fourth Proportional to 79,330.75, 109,472.82 and 43,520

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Solution

The fourth proportional to 79,330.75, 109,472.82 and 43,520 is: 60,055.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,330.75 : 109,472.82 = 43,520 : x
  2. Step 2: Convert to fraction form
    79,330.75/109,472.82 = 43,520/x
  3. Step 3: Cross multiply
    79,330.75x = 109,472.82 × 43,520
  4. Step 4: Simplify right side
    79,330.75x = 4,764,257,126.40
  5. Step 5: Solve for x
    x = 4,764,257,126.40/79,330.75
  6. Step 6: Final answer
    x = 60,055.62

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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.