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Finding the Fourth Proportional to 115,137.44, 158,890 and 66,748.80

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Solution

The fourth proportional to 115,137.44, 158,890 and 66,748.80 is: 92,113.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,137.44 : 158,890 = 66,748.80 : x
  2. Step 2: Convert to fraction form
    115,137.44/158,890 = 66,748.80/x
  3. Step 3: Cross multiply
    115,137.44x = 158,890 × 66,748.80
  4. Step 4: Simplify right side
    115,137.44x = 10,605,716,832
  5. Step 5: Solve for x
    x = 10,605,716,832/115,137.44
  6. Step 6: Final answer
    x = 92,113.54

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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.