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Finding the Fourth Proportional to 343,398.80, 515,136.60 and 106,739.60

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Solution

The fourth proportional to 343,398.80, 515,136.60 and 106,739.60 is: 160,121.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,398.80 : 515,136.60 = 106,739.60 : x
  2. Step 2: Convert to fraction form
    343,398.80/515,136.60 = 106,739.60/x
  3. Step 3: Cross multiply
    343,398.80x = 515,136.60 × 106,739.60
  4. Step 4: Simplify right side
    343,398.80x = 54,985,474,629.36
  5. Step 5: Solve for x
    x = 54,985,474,629.36/343,398.80
  6. Step 6: Final answer
    x = 160,121.34

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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.