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Finding the Third Proportional to 100,120 and 155,202

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Solution

The third proportional to 100,120 and 155,202 is: 240,587.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,120 : 155,202 = 155,202 : x
  2. Step 2: Convert to fraction form
    100,120/155,202 = 155,202/x
  3. Step 3: Cross multiply
    100,120x = 155,202 × 155,202
  4. Step 4: Simplify right side
    100,120x = 24,087,660,804
  5. Step 5: Solve for x
    x = 24,087,660,804/100,120
  6. Step 6: Final answer
    x = 240,587.90

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.