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Finding the Fourth Proportional to 78,996.53, 109,015.20 and 43,186.53

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Solution

The fourth proportional to 78,996.53, 109,015.20 and 43,186.53 is: 59,597.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,996.53 : 109,015.20 = 43,186.53 : x
  2. Step 2: Convert to fraction form
    78,996.53/109,015.20 = 43,186.53/x
  3. Step 3: Cross multiply
    78,996.53x = 109,015.20 × 43,186.53
  4. Step 4: Simplify right side
    78,996.53x = 4,707,988,205.26
  5. Step 5: Solve for x
    x = 4,707,988,205.26/78,996.53
  6. Step 6: Final answer
    x = 59,597.41

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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.