Home / 137,085.41-189,161.39-78,961.05

Finding the Fourth Proportional to 137,085.41, 189,161.39 and 78,961.05

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Solution

The fourth proportional to 137,085.41, 189,161.39 and 78,961.05 is: 108,956.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,085.41 : 189,161.39 = 78,961.05 : x
  2. Step 2: Convert to fraction form
    137,085.41/189,161.39 = 78,961.05/x
  3. Step 3: Cross multiply
    137,085.41x = 189,161.39 × 78,961.05
  4. Step 4: Simplify right side
    137,085.41x = 14,936,381,579.05
  5. Step 5: Solve for x
    x = 14,936,381,579.05/137,085.41
  6. Step 6: Final answer
    x = 108,956.76

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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.