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Finding the Fourth Proportional to 212,407.46, 318,611.16 and 87,751.70

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Solution

The fourth proportional to 212,407.46, 318,611.16 and 87,751.70 is: 131,627.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,407.46 : 318,611.16 = 87,751.70 : x
  2. Step 2: Convert to fraction form
    212,407.46/318,611.16 = 87,751.70/x
  3. Step 3: Cross multiply
    212,407.46x = 318,611.16 × 87,751.70
  4. Step 4: Simplify right side
    212,407.46x = 27,958,670,928.97
  5. Step 5: Solve for x
    x = 27,958,670,928.97/212,407.46
  6. Step 6: Final answer
    x = 131,627.54

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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.