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Finding the Fourth Proportional to 239,687.65, 330,757.89 and 137,641.32

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Solution

The fourth proportional to 239,687.65, 330,757.89 and 137,641.32 is: 189,938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,687.65 : 330,757.89 = 137,641.32 : x
  2. Step 2: Convert to fraction form
    239,687.65/330,757.89 = 137,641.32/x
  3. Step 3: Cross multiply
    239,687.65x = 330,757.89 × 137,641.32
  4. Step 4: Simplify right side
    239,687.65x = 45,525,952,580.01
  5. Step 5: Solve for x
    x = 45,525,952,580.01/239,687.65
  6. Step 6: Final answer
    x = 189,938.67

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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.