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Finding the Fourth Proportional to 79,448.39, 109,639.68 and 43,639.24

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Solution

The fourth proportional to 79,448.39, 109,639.68 and 43,639.24 is: 60,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,448.39 : 109,639.68 = 43,639.24 : x
  2. Step 2: Convert to fraction form
    79,448.39/109,639.68 = 43,639.24/x
  3. Step 3: Cross multiply
    79,448.39x = 109,639.68 × 43,639.24
  4. Step 4: Simplify right side
    79,448.39x = 4,784,592,309.04
  5. Step 5: Solve for x
    x = 4,784,592,309.04/79,448.39
  6. Step 6: Final answer
    x = 60,222.65

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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.