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Finding the Fourth Proportional to 74,112.68, 111,140.66 and 36,659.90

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Solution

The fourth proportional to 74,112.68, 111,140.66 and 36,659.90 is: 54,975.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,112.68 : 111,140.66 = 36,659.90 : x
  2. Step 2: Convert to fraction form
    74,112.68/111,140.66 = 36,659.90/x
  3. Step 3: Cross multiply
    74,112.68x = 111,140.66 × 36,659.90
  4. Step 4: Simplify right side
    74,112.68x = 4,074,405,481.53
  5. Step 5: Solve for x
    x = 4,074,405,481.53/74,112.68
  6. Step 6: Final answer
    x = 54,975.82

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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.