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Finding the Fourth Proportional to 135,383.49, 186,770.47 and 81,638.67

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Solution

The fourth proportional to 135,383.49, 186,770.47 and 81,638.67 is: 112,625.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,383.49 : 186,770.47 = 81,638.67 : x
  2. Step 2: Convert to fraction form
    135,383.49/186,770.47 = 81,638.67/x
  3. Step 3: Cross multiply
    135,383.49x = 186,770.47 × 81,638.67
  4. Step 4: Simplify right side
    135,383.49x = 15,247,692,766.07
  5. Step 5: Solve for x
    x = 15,247,692,766.07/135,383.49
  6. Step 6: Final answer
    x = 112,625.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.