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Finding the Fourth Proportional to 118,290.65, 177,369.75 and 39,361.82

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Solution

The fourth proportional to 118,290.65, 177,369.75 and 39,361.82 is: 59,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,290.65 : 177,369.75 = 39,361.82 : x
  2. Step 2: Convert to fraction form
    118,290.65/177,369.75 = 39,361.82/x
  3. Step 3: Cross multiply
    118,290.65x = 177,369.75 × 39,361.82
  4. Step 4: Simplify right side
    118,290.65x = 6,981,595,286.10
  5. Step 5: Solve for x
    x = 6,981,595,286.10/118,290.65
  6. Step 6: Final answer
    x = 59,020.69

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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.