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Finding the Fourth Proportional to 71,438.66, 107,147.46 and 18,851.84

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Solution

The fourth proportional to 71,438.66, 107,147.46 and 18,851.84 is: 28,274.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,438.66 : 107,147.46 = 18,851.84 : x
  2. Step 2: Convert to fraction form
    71,438.66/107,147.46 = 18,851.84/x
  3. Step 3: Cross multiply
    71,438.66x = 107,147.46 × 18,851.84
  4. Step 4: Simplify right side
    71,438.66x = 2,019,926,772.33
  5. Step 5: Solve for x
    x = 2,019,926,772.33/71,438.66
  6. Step 6: Final answer
    x = 28,274.98

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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.