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Finding the Fourth Proportional to 78,958.26, 108,962.13 and 43,148.49

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Solution

The fourth proportional to 78,958.26, 108,962.13 and 43,148.49 is: 59,544.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.26 : 108,962.13 = 43,148.49 : x
  2. Step 2: Convert to fraction form
    78,958.26/108,962.13 = 43,148.49/x
  3. Step 3: Cross multiply
    78,958.26x = 108,962.13 × 43,148.49
  4. Step 4: Simplify right side
    78,958.26x = 4,701,551,376.68
  5. Step 5: Solve for x
    x = 4,701,551,376.68/78,958.26
  6. Step 6: Final answer
    x = 59,544.77

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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.