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Finding the Fourth Proportional to 111,990.96, 154,536.30 and 68,963.56

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Solution

The fourth proportional to 111,990.96, 154,536.30 and 68,963.56 is: 95,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990.96 : 154,536.30 = 68,963.56 : x
  2. Step 2: Convert to fraction form
    111,990.96/154,536.30 = 68,963.56/x
  3. Step 3: Cross multiply
    111,990.96x = 154,536.30 × 68,963.56
  4. Step 4: Simplify right side
    111,990.96x = 10,657,373,397.23
  5. Step 5: Solve for x
    x = 10,657,373,397.23/111,990.96
  6. Step 6: Final answer
    x = 95,162.80

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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.