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Finding the Fourth Proportional to 69,805.63, 104,707.10 and 19,886.05

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Solution

The fourth proportional to 69,805.63, 104,707.10 and 19,886.05 is: 29,828.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,805.63 : 104,707.10 = 19,886.05 : x
  2. Step 2: Convert to fraction form
    69,805.63/104,707.10 = 19,886.05/x
  3. Step 3: Cross multiply
    69,805.63x = 104,707.10 × 19,886.05
  4. Step 4: Simplify right side
    69,805.63x = 2,082,210,625.96
  5. Step 5: Solve for x
    x = 2,082,210,625.96/69,805.63
  6. Step 6: Final answer
    x = 29,828.69

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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.