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Finding the Fourth Proportional to 167,128.28, 230,638.81 and 90,647.48

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Solution

The fourth proportional to 167,128.28, 230,638.81 and 90,647.48 is: 125,094.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,128.28 : 230,638.81 = 90,647.48 : x
  2. Step 2: Convert to fraction form
    167,128.28/230,638.81 = 90,647.48/x
  3. Step 3: Cross multiply
    167,128.28x = 230,638.81 × 90,647.48
  4. Step 4: Simplify right side
    167,128.28x = 20,906,826,916.70
  5. Step 5: Solve for x
    x = 20,906,826,916.70/167,128.28
  6. Step 6: Final answer
    x = 125,094.49

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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.