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Finding the Fourth Proportional to 69,786, 104,678.64 and 38,687.04

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Solution

The fourth proportional to 69,786, 104,678.64 and 38,687.04 is: 58,030.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,786 : 104,678.64 = 38,687.04 : x
  2. Step 2: Convert to fraction form
    69,786/104,678.64 = 38,687.04/x
  3. Step 3: Cross multiply
    69,786x = 104,678.64 × 38,687.04
  4. Step 4: Simplify right side
    69,786x = 4,049,706,732.83
  5. Step 5: Solve for x
    x = 4,049,706,732.83/69,786
  6. Step 6: Final answer
    x = 58,030.36

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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.