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Finding the Fourth Proportional to 71,428.33, 107,157.95 and 21,504.59

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Solution

The fourth proportional to 71,428.33, 107,157.95 and 21,504.59 is: 32,261.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,428.33 : 107,157.95 = 21,504.59 : x
  2. Step 2: Convert to fraction form
    71,428.33/107,157.95 = 21,504.59/x
  3. Step 3: Cross multiply
    71,428.33x = 107,157.95 × 21,504.59
  4. Step 4: Simplify right side
    71,428.33x = 2,304,387,136.68
  5. Step 5: Solve for x
    x = 2,304,387,136.68/71,428.33
  6. Step 6: Final answer
    x = 32,261.53

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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.