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Finding the Fourth Proportional to 118,344, 177,428.40 and 71,586.48

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Solution

The fourth proportional to 118,344, 177,428.40 and 71,586.48 is: 107,326.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,344 : 177,428.40 = 71,586.48 : x
  2. Step 2: Convert to fraction form
    118,344/177,428.40 = 71,586.48/x
  3. Step 3: Cross multiply
    118,344x = 177,428.40 × 71,586.48
  4. Step 4: Simplify right side
    118,344x = 12,701,474,608.03
  5. Step 5: Solve for x
    x = 12,701,474,608.03/118,344
  6. Step 6: Final answer
    x = 107,326.73

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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.