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Finding the Fourth Proportional to 48,679.64, 73,019.46 and 19,111.40

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Solution

The fourth proportional to 48,679.64, 73,019.46 and 19,111.40 is: 28,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,679.64 : 73,019.46 = 19,111.40 : x
  2. Step 2: Convert to fraction form
    48,679.64/73,019.46 = 19,111.40/x
  3. Step 3: Cross multiply
    48,679.64x = 73,019.46 × 19,111.40
  4. Step 4: Simplify right side
    48,679.64x = 1,395,504,107.84
  5. Step 5: Solve for x
    x = 1,395,504,107.84/48,679.64
  6. Step 6: Final answer
    x = 28,667.10

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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.