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Finding the Fourth Proportional to 138,481.56, 207,730.62 and 43,714.80

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Solution

The fourth proportional to 138,481.56, 207,730.62 and 43,714.80 is: 65,574.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,481.56 : 207,730.62 = 43,714.80 : x
  2. Step 2: Convert to fraction form
    138,481.56/207,730.62 = 43,714.80/x
  3. Step 3: Cross multiply
    138,481.56x = 207,730.62 × 43,714.80
  4. Step 4: Simplify right side
    138,481.56x = 9,080,902,507.18
  5. Step 5: Solve for x
    x = 9,080,902,507.18/138,481.56
  6. Step 6: Final answer
    x = 65,574.81

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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.