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Finding the Fourth Proportional to 166,021.20, 248,734.80 and 100,987.20

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Solution

The fourth proportional to 166,021.20, 248,734.80 and 100,987.20 is: 151,300.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,021.20 : 248,734.80 = 100,987.20 : x
  2. Step 2: Convert to fraction form
    166,021.20/248,734.80 = 100,987.20/x
  3. Step 3: Cross multiply
    166,021.20x = 248,734.80 × 100,987.20
  4. Step 4: Simplify right side
    166,021.20x = 25,119,030,994.56
  5. Step 5: Solve for x
    x = 25,119,030,994.56/166,021.20
  6. Step 6: Final answer
    x = 151,300.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.