Home / 212,915.20-319,372.80-100,558.48

Finding the Fourth Proportional to 212,915.20, 319,372.80 and 100,558.48

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Solution

The fourth proportional to 212,915.20, 319,372.80 and 100,558.48 is: 150,837.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,915.20 : 319,372.80 = 100,558.48 : x
  2. Step 2: Convert to fraction form
    212,915.20/319,372.80 = 100,558.48/x
  3. Step 3: Cross multiply
    212,915.20x = 319,372.80 × 100,558.48
  4. Step 4: Simplify right side
    212,915.20x = 32,115,643,321.34
  5. Step 5: Solve for x
    x = 32,115,643,321.34/212,915.20
  6. Step 6: Final answer
    x = 150,837.72

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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.