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Finding the Fourth Proportional to 91,863.40, 137,795.10 and 90,634.60

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Solution

The fourth proportional to 91,863.40, 137,795.10 and 90,634.60 is: 135,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,863.40 : 137,795.10 = 90,634.60 : x
  2. Step 2: Convert to fraction form
    91,863.40/137,795.10 = 90,634.60/x
  3. Step 3: Cross multiply
    91,863.40x = 137,795.10 × 90,634.60
  4. Step 4: Simplify right side
    91,863.40x = 12,489,003,770.46
  5. Step 5: Solve for x
    x = 12,489,003,770.46/91,863.40
  6. Step 6: Final answer
    x = 135,951.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.