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Finding the Fourth Proportional to 107,912.80, 161,915.90 and 57,934.60

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Solution

The fourth proportional to 107,912.80, 161,915.90 and 57,934.60 is: 86,926.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,912.80 : 161,915.90 = 57,934.60 : x
  2. Step 2: Convert to fraction form
    107,912.80/161,915.90 = 57,934.60/x
  3. Step 3: Cross multiply
    107,912.80x = 161,915.90 × 57,934.60
  4. Step 4: Simplify right side
    107,912.80x = 9,380,532,900.14
  5. Step 5: Solve for x
    x = 9,380,532,900.14/107,912.80
  6. Step 6: Final answer
    x = 86,926.97

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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.