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Finding the Fourth Proportional to 103,796.60, 155,366.85 and 74,272.10

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Solution

The fourth proportional to 103,796.60, 155,366.85 and 74,272.10 is: 111,173.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,796.60 : 155,366.85 = 74,272.10 : x
  2. Step 2: Convert to fraction form
    103,796.60/155,366.85 = 74,272.10/x
  3. Step 3: Cross multiply
    103,796.60x = 155,366.85 × 74,272.10
  4. Step 4: Simplify right side
    103,796.60x = 11,539,422,219.89
  5. Step 5: Solve for x
    x = 11,539,422,219.89/103,796.60
  6. Step 6: Final answer
    x = 111,173.41

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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.