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Finding the Fourth Proportional to 66,968.20, 100,452.30 and 25,415.20

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Solution

The fourth proportional to 66,968.20, 100,452.30 and 25,415.20 is: 38,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,968.20 : 100,452.30 = 25,415.20 : x
  2. Step 2: Convert to fraction form
    66,968.20/100,452.30 = 25,415.20/x
  3. Step 3: Cross multiply
    66,968.20x = 100,452.30 × 25,415.20
  4. Step 4: Simplify right side
    66,968.20x = 2,553,015,294.96
  5. Step 5: Solve for x
    x = 2,553,015,294.96/66,968.20
  6. Step 6: Final answer
    x = 38,122.80

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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.