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Finding the Fourth Proportional to 212,247.92, 318,371.88 and 145,485.65

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Solution

The fourth proportional to 212,247.92, 318,371.88 and 145,485.65 is: 218,228.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,247.92 : 318,371.88 = 145,485.65 : x
  2. Step 2: Convert to fraction form
    212,247.92/318,371.88 = 145,485.65/x
  3. Step 3: Cross multiply
    212,247.92x = 318,371.88 × 145,485.65
  4. Step 4: Simplify right side
    212,247.92x = 46,318,541,245.02
  5. Step 5: Solve for x
    x = 46,318,541,245.02/212,247.92
  6. Step 6: Final answer
    x = 218,228.48

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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.