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Finding the Fourth Proportional to 198,990.32, 274,517.88 and 134,438.78

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Solution

The fourth proportional to 198,990.32, 274,517.88 and 134,438.78 is: 185,465.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,990.32 : 274,517.88 = 134,438.78 : x
  2. Step 2: Convert to fraction form
    198,990.32/274,517.88 = 134,438.78/x
  3. Step 3: Cross multiply
    198,990.32x = 274,517.88 × 134,438.78
  4. Step 4: Simplify right side
    198,990.32x = 36,905,848,875.39
  5. Step 5: Solve for x
    x = 36,905,848,875.39/198,990.32
  6. Step 6: Final answer
    x = 185,465.55

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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.