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Finding the Fourth Proportional to 69,710.31, 104,549.79 and 19,789.35

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Solution

The fourth proportional to 69,710.31, 104,549.79 and 19,789.35 is: 29,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,710.31 : 104,549.79 = 19,789.35 : x
  2. Step 2: Convert to fraction form
    69,710.31/104,549.79 = 19,789.35/x
  3. Step 3: Cross multiply
    69,710.31x = 104,549.79 × 19,789.35
  4. Step 4: Simplify right side
    69,710.31x = 2,068,972,386.74
  5. Step 5: Solve for x
    x = 2,068,972,386.74/69,710.31
  6. Step 6: Final answer
    x = 29,679.58

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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.