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Finding the Fourth Proportional to 212,323.38, 318,485.09 and 54,551.84

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Solution

The fourth proportional to 212,323.38, 318,485.09 and 54,551.84 is: 81,827.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,323.38 : 318,485.09 = 54,551.84 : x
  2. Step 2: Convert to fraction form
    212,323.38/318,485.09 = 54,551.84/x
  3. Step 3: Cross multiply
    212,323.38x = 318,485.09 × 54,551.84
  4. Step 4: Simplify right side
    212,323.38x = 17,373,945,806.88
  5. Step 5: Solve for x
    x = 17,373,945,806.88/212,323.38
  6. Step 6: Final answer
    x = 81,827.76

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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.