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Finding the Fourth Proportional to 103,316.40, 154,974.60 and 69,855.30

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Solution

The fourth proportional to 103,316.40, 154,974.60 and 69,855.30 is: 104,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,316.40 : 154,974.60 = 69,855.30 : x
  2. Step 2: Convert to fraction form
    103,316.40/154,974.60 = 69,855.30/x
  3. Step 3: Cross multiply
    103,316.40x = 154,974.60 × 69,855.30
  4. Step 4: Simplify right side
    103,316.40x = 10,825,797,175.38
  5. Step 5: Solve for x
    x = 10,825,797,175.38/103,316.40
  6. Step 6: Final answer
    x = 104,782.95

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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.