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Finding the Fourth Proportional to 212,661.30, 318,659.74 and 180,940.92

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Solution

The fourth proportional to 212,661.30, 318,659.74 and 180,940.92 is: 271,128.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,661.30 : 318,659.74 = 180,940.92 : x
  2. Step 2: Convert to fraction form
    212,661.30/318,659.74 = 180,940.92/x
  3. Step 3: Cross multiply
    212,661.30x = 318,659.74 × 180,940.92
  4. Step 4: Simplify right side
    212,661.30x = 57,658,586,522.56
  5. Step 5: Solve for x
    x = 57,658,586,522.56/212,661.30
  6. Step 6: Final answer
    x = 271,128.72

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1.5x scale

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.