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Finding the Fourth Proportional to 103,630.56, 155,445.82 and 28,750.70

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Solution

The fourth proportional to 103,630.56, 155,445.82 and 28,750.70 is: 43,126.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.56 : 155,445.82 = 28,750.70 : x
  2. Step 2: Convert to fraction form
    103,630.56/155,445.82 = 28,750.70/x
  3. Step 3: Cross multiply
    103,630.56x = 155,445.82 × 28,750.70
  4. Step 4: Simplify right side
    103,630.56x = 4,469,176,137.07
  5. Step 5: Solve for x
    x = 4,469,176,137.07/103,630.56
  6. Step 6: Final answer
    x = 43,126.04

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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.