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Finding the Third Proportional to 55,136 and 87,628

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Solution

The third proportional to 55,136 and 87,628 is: 139,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,136 : 87,628 = 87,628 : x
  2. Step 2: Convert to fraction form
    55,136/87,628 = 87,628/x
  3. Step 3: Cross multiply
    55,136x = 87,628 × 87,628
  4. Step 4: Simplify right side
    55,136x = 7,678,666,384
  5. Step 5: Solve for x
    x = 7,678,666,384/55,136
  6. Step 6: Final answer
    x = 139,267.74

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.