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Finding the Fourth Proportional to 69,312.09, 103,974.68 and 19,392.20

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Solution

The fourth proportional to 69,312.09, 103,974.68 and 19,392.20 is: 29,090.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,312.09 : 103,974.68 = 19,392.20 : x
  2. Step 2: Convert to fraction form
    69,312.09/103,974.68 = 19,392.20/x
  3. Step 3: Cross multiply
    69,312.09x = 103,974.68 × 19,392.20
  4. Step 4: Simplify right side
    69,312.09x = 2,016,297,318.10
  5. Step 5: Solve for x
    x = 2,016,297,318.10/69,312.09
  6. Step 6: Final answer
    x = 29,090.12

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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.