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Finding the Fourth Proportional to 136,992.64, 189,049.17 and 76,563.22

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Solution

The fourth proportional to 136,992.64, 189,049.17 and 76,563.22 is: 105,656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,992.64 : 189,049.17 = 76,563.22 : x
  2. Step 2: Convert to fraction form
    136,992.64/189,049.17 = 76,563.22/x
  3. Step 3: Cross multiply
    136,992.64x = 189,049.17 × 76,563.22
  4. Step 4: Simplify right side
    136,992.64x = 14,474,213,193.53
  5. Step 5: Solve for x
    x = 14,474,213,193.53/136,992.64
  6. Step 6: Final answer
    x = 105,656.87

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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.