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Finding the Fourth Proportional to 91,993.78, 137,990.40 and 25,433.74

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Solution

The fourth proportional to 91,993.78, 137,990.40 and 25,433.74 is: 38,150.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,993.78 : 137,990.40 = 25,433.74 : x
  2. Step 2: Convert to fraction form
    91,993.78/137,990.40 = 25,433.74/x
  3. Step 3: Cross multiply
    91,993.78x = 137,990.40 × 25,433.74
  4. Step 4: Simplify right side
    91,993.78x = 3,509,611,956.10
  5. Step 5: Solve for x
    x = 3,509,611,956.10/91,993.78
  6. Step 6: Final answer
    x = 38,150.54

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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.