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Finding the Fourth Proportional to 79,440.64, 109,629.90 and 43,633

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Solution

The fourth proportional to 79,440.64, 109,629.90 and 43,633 is: 60,214.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,440.64 : 109,629.90 = 43,633 : x
  2. Step 2: Convert to fraction form
    79,440.64/109,629.90 = 43,633/x
  3. Step 3: Cross multiply
    79,440.64x = 109,629.90 × 43,633
  4. Step 4: Simplify right side
    79,440.64x = 4,783,481,426.70
  5. Step 5: Solve for x
    x = 4,783,481,426.70/79,440.64
  6. Step 6: Final answer
    x = 60,214.54

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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.