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Finding the Fourth Proportional to 69,805.64, 104,707.10 and 19,886.06

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Solution

The fourth proportional to 69,805.64, 104,707.10 and 19,886.06 is: 29,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,805.64 : 104,707.10 = 19,886.06 : x
  2. Step 2: Convert to fraction form
    69,805.64/104,707.10 = 19,886.06/x
  3. Step 3: Cross multiply
    69,805.64x = 104,707.10 × 19,886.06
  4. Step 4: Simplify right side
    69,805.64x = 2,082,211,673.03
  5. Step 5: Solve for x
    x = 2,082,211,673.03/69,805.64
  6. Step 6: Final answer
    x = 29,828.70

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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.