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Finding the Fourth Proportional to 138,662.66, 208,025.10 and 43,898.51

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Solution

The fourth proportional to 138,662.66, 208,025.10 and 43,898.51 is: 65,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,662.66 : 208,025.10 = 43,898.51 : x
  2. Step 2: Convert to fraction form
    138,662.66/208,025.10 = 43,898.51/x
  3. Step 3: Cross multiply
    138,662.66x = 208,025.10 × 43,898.51
  4. Step 4: Simplify right side
    138,662.66x = 9,131,990,892.48
  5. Step 5: Solve for x
    x = 9,131,990,892.48/138,662.66
  6. Step 6: Final answer
    x = 65,857.61

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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.