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Finding the Third Proportional to 79,520 and 119,280

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Solution

The third proportional to 79,520 and 119,280 is: 178,920

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,520 : 119,280 = 119,280 : x
  2. Step 2: Convert to fraction form
    79,520/119,280 = 119,280/x
  3. Step 3: Cross multiply
    79,520x = 119,280 × 119,280
  4. Step 4: Simplify right side
    79,520x = 14,227,718,400
  5. Step 5: Solve for x
    x = 14,227,718,400/79,520
  6. Step 6: Final answer
    x = 178,920

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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.