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Finding the Fourth Proportional to 111,989.96, 154,534.92 and 68,962.56

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Solution

The fourth proportional to 111,989.96, 154,534.92 and 68,962.56 is: 95,161.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.96 : 154,534.92 = 68,962.56 : x
  2. Step 2: Convert to fraction form
    111,989.96/154,534.92 = 68,962.56/x
  3. Step 3: Cross multiply
    111,989.96x = 154,534.92 × 68,962.56
  4. Step 4: Simplify right side
    111,989.96x = 10,657,123,692.60
  5. Step 5: Solve for x
    x = 10,657,123,692.60/111,989.96
  6. Step 6: Final answer
    x = 95,161.42

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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.