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Finding the Third Proportional to 77,915.75 and 168,292

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Solution

The third proportional to 77,915.75 and 168,292 is: 363,497.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,915.75 : 168,292 = 168,292 : x
  2. Step 2: Convert to fraction form
    77,915.75/168,292 = 168,292/x
  3. Step 3: Cross multiply
    77,915.75x = 168,292 × 168,292
  4. Step 4: Simplify right side
    77,915.75x = 28,322,197,264
  5. Step 5: Solve for x
    x = 28,322,197,264/77,915.75
  6. Step 6: Final answer
    x = 363,497.72

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.