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Finding the Fourth Proportional to 135,978.36, 203,604.66 and 79,772.28

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Solution

The fourth proportional to 135,978.36, 203,604.66 and 79,772.28 is: 119,445.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,978.36 : 203,604.66 = 79,772.28 : x
  2. Step 2: Convert to fraction form
    135,978.36/203,604.66 = 79,772.28/x
  3. Step 3: Cross multiply
    135,978.36x = 203,604.66 × 79,772.28
  4. Step 4: Simplify right side
    135,978.36x = 16,242,007,946.82
  5. Step 5: Solve for x
    x = 16,242,007,946.82/135,978.36
  6. Step 6: Final answer
    x = 119,445.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.