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Finding the Fourth Proportional to 107,551.80, 161,181.90 and 71,911.80

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Solution

The fourth proportional to 107,551.80, 161,181.90 and 71,911.80 is: 107,770.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,551.80 : 161,181.90 = 71,911.80 : x
  2. Step 2: Convert to fraction form
    107,551.80/161,181.90 = 71,911.80/x
  3. Step 3: Cross multiply
    107,551.80x = 161,181.90 × 71,911.80
  4. Step 4: Simplify right side
    107,551.80x = 11,590,880,556.42
  5. Step 5: Solve for x
    x = 11,590,880,556.42/107,551.80
  6. Step 6: Final answer
    x = 107,770.21

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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.