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Finding the Fourth Proportional to 78,915.24, 118,372.87 and 28,973.73

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Solution

The fourth proportional to 78,915.24, 118,372.87 and 28,973.73 is: 43,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,915.24 : 118,372.87 = 28,973.73 : x
  2. Step 2: Convert to fraction form
    78,915.24/118,372.87 = 28,973.73/x
  3. Step 3: Cross multiply
    78,915.24x = 118,372.87 × 28,973.73
  4. Step 4: Simplify right side
    78,915.24x = 3,429,703,745.75
  5. Step 5: Solve for x
    x = 3,429,703,745.75/78,915.24
  6. Step 6: Final answer
    x = 43,460.60

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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.