Home / 135,640.89-187,189.05-75,208

Finding the Fourth Proportional to 135,640.89, 187,189.05 and 75,208

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Solution

The fourth proportional to 135,640.89, 187,189.05 and 75,208 is: 103,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,640.89 : 187,189.05 = 75,208 : x
  2. Step 2: Convert to fraction form
    135,640.89/187,189.05 = 75,208/x
  3. Step 3: Cross multiply
    135,640.89x = 187,189.05 × 75,208
  4. Step 4: Simplify right side
    135,640.89x = 14,078,114,072.40
  5. Step 5: Solve for x
    x = 14,078,114,072.40/135,640.89
  6. Step 6: Final answer
    x = 103,789.60

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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.