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Finding the Fourth Proportional to 138,656.37, 207,999.19 and 43,899.64

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Solution

The fourth proportional to 138,656.37, 207,999.19 and 43,899.64 is: 65,854.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,656.37 : 207,999.19 = 43,899.64 : x
  2. Step 2: Convert to fraction form
    138,656.37/207,999.19 = 43,899.64/x
  3. Step 3: Cross multiply
    138,656.37x = 207,999.19 × 43,899.64
  4. Step 4: Simplify right side
    138,656.37x = 9,131,089,096.17
  5. Step 5: Solve for x
    x = 9,131,089,096.17/138,656.37
  6. Step 6: Final answer
    x = 65,854.09

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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.