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Finding the Fourth Proportional to 69,987.21, 104,863.94 and 49,173.45

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Solution

The fourth proportional to 69,987.21, 104,863.94 and 49,173.45 is: 73,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,987.21 : 104,863.94 = 49,173.45 : x
  2. Step 2: Convert to fraction form
    69,987.21/104,863.94 = 49,173.45/x
  3. Step 3: Cross multiply
    69,987.21x = 104,863.94 × 49,173.45
  4. Step 4: Simplify right side
    69,987.21x = 5,156,521,464.53
  5. Step 5: Solve for x
    x = 5,156,521,464.53/69,987.21
  6. Step 6: Final answer
    x = 73,678.05

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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.