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Finding the Fourth Proportional to 239,606.88, 330,672.60 and 137,664.96

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Solution

The fourth proportional to 239,606.88, 330,672.60 and 137,664.96 is: 189,986.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,606.88 : 330,672.60 = 137,664.96 : x
  2. Step 2: Convert to fraction form
    239,606.88/330,672.60 = 137,664.96/x
  3. Step 3: Cross multiply
    239,606.88x = 330,672.60 × 137,664.96
  4. Step 4: Simplify right side
    239,606.88x = 45,522,030,252.10
  5. Step 5: Solve for x
    x = 45,522,030,252.10/239,606.88
  6. Step 6: Final answer
    x = 189,986.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.