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Finding the Fourth Proportional to 320,749.98, 481,126.98 and 84,090.54

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Solution

The fourth proportional to 320,749.98, 481,126.98 and 84,090.54 is: 126,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,749.98 : 481,126.98 = 84,090.54 : x
  2. Step 2: Convert to fraction form
    320,749.98/481,126.98 = 84,090.54/x
  3. Step 3: Cross multiply
    320,749.98x = 481,126.98 × 84,090.54
  4. Step 4: Simplify right side
    320,749.98x = 40,458,227,556.77
  5. Step 5: Solve for x
    x = 40,458,227,556.77/320,749.98
  6. Step 6: Final answer
    x = 126,136.34

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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.