Home / 212,621.60-318,817.20-87,975.20

Finding the Fourth Proportional to 212,621.60, 318,817.20 and 87,975.20

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Solution

The fourth proportional to 212,621.60, 318,817.20 and 87,975.20 is: 131,915.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,621.60 : 318,817.20 = 87,975.20 : x
  2. Step 2: Convert to fraction form
    212,621.60/318,817.20 = 87,975.20/x
  3. Step 3: Cross multiply
    212,621.60x = 318,817.20 × 87,975.20
  4. Step 4: Simplify right side
    212,621.60x = 28,048,006,933.44
  5. Step 5: Solve for x
    x = 28,048,006,933.44/212,621.60
  6. Step 6: Final answer
    x = 131,915.13

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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.