Home / 215,915.85-298,102.55-135,453.69

Finding the Fourth Proportional to 215,915.85, 298,102.55 and 135,453.69

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Solution

The fourth proportional to 215,915.85, 298,102.55 and 135,453.69 is: 187,013.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,915.85 : 298,102.55 = 135,453.69 : x
  2. Step 2: Convert to fraction form
    215,915.85/298,102.55 = 135,453.69/x
  3. Step 3: Cross multiply
    215,915.85x = 298,102.55 × 135,453.69
  4. Step 4: Simplify right side
    215,915.85x = 40,379,089,718.64
  5. Step 5: Solve for x
    x = 40,379,089,718.64/215,915.85
  6. Step 6: Final answer
    x = 187,013.09

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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.