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Finding the Fourth Proportional to 135,028.51, 186,343.11 and 74,603.05

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Solution

The fourth proportional to 135,028.51, 186,343.11 and 74,603.05 is: 102,954.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,028.51 : 186,343.11 = 74,603.05 : x
  2. Step 2: Convert to fraction form
    135,028.51/186,343.11 = 74,603.05/x
  3. Step 3: Cross multiply
    135,028.51x = 186,343.11 × 74,603.05
  4. Step 4: Simplify right side
    135,028.51x = 13,901,764,072.72
  5. Step 5: Solve for x
    x = 13,901,764,072.72/135,028.51
  6. Step 6: Final answer
    x = 102,954.29

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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.