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Finding the Fourth Proportional to 117,720.62, 162,453.74 and 66,743

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Solution

The fourth proportional to 117,720.62, 162,453.74 and 66,743 is: 92,104.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,720.62 : 162,453.74 = 66,743 : x
  2. Step 2: Convert to fraction form
    117,720.62/162,453.74 = 66,743/x
  3. Step 3: Cross multiply
    117,720.62x = 162,453.74 × 66,743
  4. Step 4: Simplify right side
    117,720.62x = 10,842,649,968.82
  5. Step 5: Solve for x
    x = 10,842,649,968.82/117,720.62
  6. Step 6: Final answer
    x = 92,104.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.