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Finding the Fourth Proportional to 137,025.92, 189,101.28 and 79,664.96

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Solution

The fourth proportional to 137,025.92, 189,101.28 and 79,664.96 is: 109,940.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,025.92 : 189,101.28 = 79,664.96 : x
  2. Step 2: Convert to fraction form
    137,025.92/189,101.28 = 79,664.96/x
  3. Step 3: Cross multiply
    137,025.92x = 189,101.28 × 79,664.96
  4. Step 4: Simplify right side
    137,025.92x = 15,064,745,907.15
  5. Step 5: Solve for x
    x = 15,064,745,907.15/137,025.92
  6. Step 6: Final answer
    x = 109,940.85

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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.