Home / 154,321.03-212,915.77-100,586.44

Finding the Fourth Proportional to 154,321.03, 212,915.77 and 100,586.44

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Solution

The fourth proportional to 154,321.03, 212,915.77 and 100,586.44 is: 138,778.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,321.03 : 212,915.77 = 100,586.44 : x
  2. Step 2: Convert to fraction form
    154,321.03/212,915.77 = 100,586.44/x
  3. Step 3: Cross multiply
    154,321.03x = 212,915.77 × 100,586.44
  4. Step 4: Simplify right side
    154,321.03x = 21,416,438,540.40
  5. Step 5: Solve for x
    x = 21,416,438,540.40/154,321.03
  6. Step 6: Final answer
    x = 138,778.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.