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Finding the Fourth Proportional to 239,688.69, 330,759.27 and 137,642.33

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Solution

The fourth proportional to 239,688.69, 330,759.27 and 137,642.33 is: 189,940.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,688.69 : 330,759.27 = 137,642.33 : x
  2. Step 2: Convert to fraction form
    239,688.69/330,759.27 = 137,642.33/x
  3. Step 3: Cross multiply
    239,688.69x = 330,759.27 × 137,642.33
  4. Step 4: Simplify right side
    239,688.69x = 45,526,474,938.10
  5. Step 5: Solve for x
    x = 45,526,474,938.10/239,688.69
  6. Step 6: Final answer
    x = 189,940.02

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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.