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Finding the Fourth Proportional to 69,154, 103,731.04 and 19,906

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Solution

The fourth proportional to 69,154, 103,731.04 and 19,906 is: 29,859.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,154 : 103,731.04 = 19,906 : x
  2. Step 2: Convert to fraction form
    69,154/103,731.04 = 19,906/x
  3. Step 3: Cross multiply
    69,154x = 103,731.04 × 19,906
  4. Step 4: Simplify right side
    69,154x = 2,064,870,082.24
  5. Step 5: Solve for x
    x = 2,064,870,082.24/69,154
  6. Step 6: Final answer
    x = 29,859.01

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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.