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Finding the Fourth Proportional to 138,612.06, 207,943.71 and 43,866.09

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Solution

The fourth proportional to 138,612.06, 207,943.71 and 43,866.09 is: 65,807.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.06 : 207,943.71 = 43,866.09 : x
  2. Step 2: Convert to fraction form
    138,612.06/207,943.71 = 43,866.09/x
  3. Step 3: Cross multiply
    138,612.06x = 207,943.71 × 43,866.09
  4. Step 4: Simplify right side
    138,612.06x = 9,121,677,497.79
  5. Step 5: Solve for x
    x = 9,121,677,497.79/138,612.06
  6. Step 6: Final answer
    x = 65,807.24

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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.