Home / 138,069.25-206,771.72-78,725.01

Finding the Fourth Proportional to 138,069.25, 206,771.72 and 78,725.01

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Solution

The fourth proportional to 138,069.25, 206,771.72 and 78,725.01 is: 117,898.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,069.25 : 206,771.72 = 78,725.01 : x
  2. Step 2: Convert to fraction form
    138,069.25/206,771.72 = 78,725.01/x
  3. Step 3: Cross multiply
    138,069.25x = 206,771.72 × 78,725.01
  4. Step 4: Simplify right side
    138,069.25x = 16,278,104,850.92
  5. Step 5: Solve for x
    x = 16,278,104,850.92/138,069.25
  6. Step 6: Final answer
    x = 117,898.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.