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Finding the Fourth Proportional to 78,984.36, 108,996.48 and 43,173.36

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Solution

The fourth proportional to 78,984.36, 108,996.48 and 43,173.36 is: 59,578.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,984.36 : 108,996.48 = 43,173.36 : x
  2. Step 2: Convert to fraction form
    78,984.36/108,996.48 = 43,173.36/x
  3. Step 3: Cross multiply
    78,984.36x = 108,996.48 × 43,173.36
  4. Step 4: Simplify right side
    78,984.36x = 4,705,744,269.77
  5. Step 5: Solve for x
    x = 4,705,744,269.77/78,984.36
  6. Step 6: Final answer
    x = 59,578.18

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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.