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Finding the Third Proportional to 34,389 and 75,420

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Solution

The third proportional to 34,389 and 75,420 is: 165,406.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,389 : 75,420 = 75,420 : x
  2. Step 2: Convert to fraction form
    34,389/75,420 = 75,420/x
  3. Step 3: Cross multiply
    34,389x = 75,420 × 75,420
  4. Step 4: Simplify right side
    34,389x = 5,688,176,400
  5. Step 5: Solve for x
    x = 5,688,176,400/34,389
  6. Step 6: Final answer
    x = 165,406.86

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.