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Finding the Fourth Proportional to 135,047.05, 186,375.33 and 74,622.87

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Solution

The fourth proportional to 135,047.05, 186,375.33 and 74,622.87 is: 102,985.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,047.05 : 186,375.33 = 74,622.87 : x
  2. Step 2: Convert to fraction form
    135,047.05/186,375.33 = 74,622.87/x
  3. Step 3: Cross multiply
    135,047.05x = 186,375.33 × 74,622.87
  4. Step 4: Simplify right side
    135,047.05x = 13,907,862,021.80
  5. Step 5: Solve for x
    x = 13,907,862,021.80/135,047.05
  6. Step 6: Final answer
    x = 102,985.31

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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.