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Finding the Fourth Proportional to 79,880, 119,820 and 21,512

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Solution

The fourth proportional to 79,880, 119,820 and 21,512 is: 32,268

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,880 : 119,820 = 21,512 : x
  2. Step 2: Convert to fraction form
    79,880/119,820 = 21,512/x
  3. Step 3: Cross multiply
    79,880x = 119,820 × 21,512
  4. Step 4: Simplify right side
    79,880x = 2,577,567,840
  5. Step 5: Solve for x
    x = 2,577,567,840/79,880
  6. Step 6: Final answer
    x = 32,268

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.