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Finding the Third Proportional to 68,176.69 and 72,915.19

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Solution

The third proportional to 68,176.69 and 72,915.19 is: 77,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,176.69 : 72,915.19 = 72,915.19 : x
  2. Step 2: Convert to fraction form
    68,176.69/72,915.19 = 72,915.19/x
  3. Step 3: Cross multiply
    68,176.69x = 72,915.19 × 72,915.19
  4. Step 4: Simplify right side
    68,176.69x = 5,316,624,568.16
  5. Step 5: Solve for x
    x = 5,316,624,568.16/68,176.69
  6. Step 6: Final answer
    x = 77,983.03

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.