Home / 80,586.16-120,880.36-21,421.54

Finding the Fourth Proportional to 80,586.16, 120,880.36 and 21,421.54

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Solution

The fourth proportional to 80,586.16, 120,880.36 and 21,421.54 is: 32,132.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,586.16 : 120,880.36 = 21,421.54 : x
  2. Step 2: Convert to fraction form
    80,586.16/120,880.36 = 21,421.54/x
  3. Step 3: Cross multiply
    80,586.16x = 120,880.36 × 21,421.54
  4. Step 4: Simplify right side
    80,586.16x = 2,589,443,466.95
  5. Step 5: Solve for x
    x = 2,589,443,466.95/80,586.16
  6. Step 6: Final answer
    x = 32,132.61

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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.