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Finding the Fourth Proportional to 117,721.62, 162,455.13 and 66,744

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Solution

The fourth proportional to 117,721.62, 162,455.13 and 66,744 is: 92,106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,721.62 : 162,455.13 = 66,744 : x
  2. Step 2: Convert to fraction form
    117,721.62/162,455.13 = 66,744/x
  3. Step 3: Cross multiply
    117,721.62x = 162,455.13 × 66,744
  4. Step 4: Simplify right side
    117,721.62x = 10,842,905,196.72
  5. Step 5: Solve for x
    x = 10,842,905,196.72/117,721.62
  6. Step 6: Final answer
    x = 92,106.32

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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.