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Finding the Fourth Proportional to 71,460.39, 107,195.60 and 21,540.90

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Solution

The fourth proportional to 71,460.39, 107,195.60 and 21,540.90 is: 32,312.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,460.39 : 107,195.60 = 21,540.90 : x
  2. Step 2: Convert to fraction form
    71,460.39/107,195.60 = 21,540.90/x
  3. Step 3: Cross multiply
    71,460.39x = 107,195.60 × 21,540.90
  4. Step 4: Simplify right side
    71,460.39x = 2,309,089,700.04
  5. Step 5: Solve for x
    x = 2,309,089,700.04/71,460.39
  6. Step 6: Final answer
    x = 32,312.86

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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.