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Finding the Fourth Proportional to 66,900.48, 100,354.56 and 20,148.48

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Solution

The fourth proportional to 66,900.48, 100,354.56 and 20,148.48 is: 30,223.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,900.48 : 100,354.56 = 20,148.48 : x
  2. Step 2: Convert to fraction form
    66,900.48/100,354.56 = 20,148.48/x
  3. Step 3: Cross multiply
    66,900.48x = 100,354.56 × 20,148.48
  4. Step 4: Simplify right side
    66,900.48x = 2,021,991,845.07
  5. Step 5: Solve for x
    x = 2,021,991,845.07/66,900.48
  6. Step 6: Final answer
    x = 30,223.88

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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.