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Finding the Fourth Proportional to 138,665.95, 207,999.53 and 43,896.60

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Solution

The fourth proportional to 138,665.95, 207,999.53 and 43,896.60 is: 65,845.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,665.95 : 207,999.53 = 43,896.60 : x
  2. Step 2: Convert to fraction form
    138,665.95/207,999.53 = 43,896.60/x
  3. Step 3: Cross multiply
    138,665.95x = 207,999.53 × 43,896.60
  4. Step 4: Simplify right side
    138,665.95x = 9,130,472,360.65
  5. Step 5: Solve for x
    x = 9,130,472,360.65/138,665.95
  6. Step 6: Final answer
    x = 65,845.09

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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.