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Finding the Fourth Proportional to 66,756.64, 100,135.20 and 19,374.64

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Solution

The fourth proportional to 66,756.64, 100,135.20 and 19,374.64 is: 29,062.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,756.64 : 100,135.20 = 19,374.64 : x
  2. Step 2: Convert to fraction form
    66,756.64/100,135.20 = 19,374.64/x
  3. Step 3: Cross multiply
    66,756.64x = 100,135.20 × 19,374.64
  4. Step 4: Simplify right side
    66,756.64x = 1,940,083,451.33
  5. Step 5: Solve for x
    x = 1,940,083,451.33/66,756.64
  6. Step 6: Final answer
    x = 29,062.03

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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.