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Finding the Fourth Proportional to 66,748.74, 100,132.83 and 20,005.26

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Solution

The fourth proportional to 66,748.74, 100,132.83 and 20,005.26 is: 30,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,748.74 : 100,132.83 = 20,005.26 : x
  2. Step 2: Convert to fraction form
    66,748.74/100,132.83 = 20,005.26/x
  3. Step 3: Cross multiply
    66,748.74x = 100,132.83 × 20,005.26
  4. Step 4: Simplify right side
    66,748.74x = 2,003,183,298.69
  5. Step 5: Solve for x
    x = 2,003,183,298.69/66,748.74
  6. Step 6: Final answer
    x = 30,010.80

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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.