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Finding the Fourth Proportional to 91,954.92, 137,915.11 and 28,765.58

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Solution

The fourth proportional to 91,954.92, 137,915.11 and 28,765.58 is: 43,142.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,954.92 : 137,915.11 = 28,765.58 : x
  2. Step 2: Convert to fraction form
    91,954.92/137,915.11 = 28,765.58/x
  3. Step 3: Cross multiply
    91,954.92x = 137,915.11 × 28,765.58
  4. Step 4: Simplify right side
    91,954.92x = 3,967,208,090.26
  5. Step 5: Solve for x
    x = 3,967,208,090.26/91,954.92
  6. Step 6: Final answer
    x = 43,142.97

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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.