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Finding the Third Proportional to 77,136 and 156,418

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Solution

The third proportional to 77,136 and 156,418 is: 317,187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,136 : 156,418 = 156,418 : x
  2. Step 2: Convert to fraction form
    77,136/156,418 = 156,418/x
  3. Step 3: Cross multiply
    77,136x = 156,418 × 156,418
  4. Step 4: Simplify right side
    77,136x = 24,466,590,724
  5. Step 5: Solve for x
    x = 24,466,590,724/77,136
  6. Step 6: Final answer
    x = 317,187.70

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.