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Finding the Fourth Proportional to 138,419.42, 207,656.78 and 43,664.27

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Solution

The fourth proportional to 138,419.42, 207,656.78 and 43,664.27 is: 65,505.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,419.42 : 207,656.78 = 43,664.27 : x
  2. Step 2: Convert to fraction form
    138,419.42/207,656.78 = 43,664.27/x
  3. Step 3: Cross multiply
    138,419.42x = 207,656.78 × 43,664.27
  4. Step 4: Simplify right side
    138,419.42x = 9,067,180,698.26
  5. Step 5: Solve for x
    x = 9,067,180,698.26/138,419.42
  6. Step 6: Final answer
    x = 65,505.12

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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.