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Finding the Fourth Proportional to 103,074.40, 154,611.60 and 82,338.40

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Solution

The fourth proportional to 103,074.40, 154,611.60 and 82,338.40 is: 123,507.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,074.40 : 154,611.60 = 82,338.40 : x
  2. Step 2: Convert to fraction form
    103,074.40/154,611.60 = 82,338.40/x
  3. Step 3: Cross multiply
    103,074.40x = 154,611.60 × 82,338.40
  4. Step 4: Simplify right side
    103,074.40x = 12,730,471,765.44
  5. Step 5: Solve for x
    x = 12,730,471,765.44/103,074.40
  6. Step 6: Final answer
    x = 123,507.60

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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.