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Finding the Fourth Proportional to 80,046.36, 120,071.70 and 20,880.72

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Solution

The fourth proportional to 80,046.36, 120,071.70 and 20,880.72 is: 31,321.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,046.36 : 120,071.70 = 20,880.72 : x
  2. Step 2: Convert to fraction form
    80,046.36/120,071.70 = 20,880.72/x
  3. Step 3: Cross multiply
    80,046.36x = 120,071.70 × 20,880.72
  4. Step 4: Simplify right side
    80,046.36x = 2,507,183,547.62
  5. Step 5: Solve for x
    x = 2,507,183,547.62/80,046.36
  6. Step 6: Final answer
    x = 31,321.64

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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.