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Finding the Fourth Proportional to 66,661.44, 100,041.28 and 31,600.96

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Solution

The fourth proportional to 66,661.44, 100,041.28 and 31,600.96 is: 47,424.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.44 : 100,041.28 = 31,600.96 : x
  2. Step 2: Convert to fraction form
    66,661.44/100,041.28 = 31,600.96/x
  3. Step 3: Cross multiply
    66,661.44x = 100,041.28 × 31,600.96
  4. Step 4: Simplify right side
    66,661.44x = 3,161,400,487.63
  5. Step 5: Solve for x
    x = 3,161,400,487.63/66,661.44
  6. Step 6: Final answer
    x = 47,424.73

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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.