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Finding the Fourth Proportional to 54,915.20, 82,372.80 and 50,978.60

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Solution

The fourth proportional to 54,915.20, 82,372.80 and 50,978.60 is: 76,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,915.20 : 82,372.80 = 50,978.60 : x
  2. Step 2: Convert to fraction form
    54,915.20/82,372.80 = 50,978.60/x
  3. Step 3: Cross multiply
    54,915.20x = 82,372.80 × 50,978.60
  4. Step 4: Simplify right side
    54,915.20x = 4,199,250,022.08
  5. Step 5: Solve for x
    x = 4,199,250,022.08/54,915.20
  6. Step 6: Final answer
    x = 76,467.90

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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.