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Finding the Third Proportional to 100,821 and 148,927.50

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Solution

The third proportional to 100,821 and 148,927.50 is: 219,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,821 : 148,927.50 = 148,927.50 : x
  2. Step 2: Convert to fraction form
    100,821/148,927.50 = 148,927.50/x
  3. Step 3: Cross multiply
    100,821x = 148,927.50 × 148,927.50
  4. Step 4: Simplify right side
    100,821x = 22,179,400,256.25
  5. Step 5: Solve for x
    x = 22,179,400,256.25/100,821
  6. Step 6: Final answer
    x = 219,987.90

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.