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Finding the Fourth Proportional to 308,072, 425,139.36 and 166,760

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Solution

The fourth proportional to 308,072, 425,139.36 and 166,760 is: 230,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,072 : 425,139.36 = 166,760 : x
  2. Step 2: Convert to fraction form
    308,072/425,139.36 = 166,760/x
  3. Step 3: Cross multiply
    308,072x = 425,139.36 × 166,760
  4. Step 4: Simplify right side
    308,072x = 70,896,239,673.60
  5. Step 5: Solve for x
    x = 70,896,239,673.60/308,072
  6. Step 6: Final answer
    x = 230,128.80

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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.