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Finding the Fourth Proportional to 79,664, 109,943.64 and 43,861.28

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Solution

The fourth proportional to 79,664, 109,943.64 and 43,861.28 is: 60,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,664 : 109,943.64 = 43,861.28 : x
  2. Step 2: Convert to fraction form
    79,664/109,943.64 = 43,861.28/x
  3. Step 3: Cross multiply
    79,664x = 109,943.64 × 43,861.28
  4. Step 4: Simplify right side
    79,664x = 4,822,268,778.26
  5. Step 5: Solve for x
    x = 4,822,268,778.26/79,664
  6. Step 6: Final answer
    x = 60,532.60

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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.