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Finding the Fourth Proportional to 138,958.72, 208,334.39 and 65,069.44

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Solution

The fourth proportional to 138,958.72, 208,334.39 and 65,069.44 is: 97,555.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,958.72 : 208,334.39 = 65,069.44 : x
  2. Step 2: Convert to fraction form
    138,958.72/208,334.39 = 65,069.44/x
  3. Step 3: Cross multiply
    138,958.72x = 208,334.39 × 65,069.44
  4. Step 4: Simplify right side
    138,958.72x = 13,556,201,048.37
  5. Step 5: Solve for x
    x = 13,556,201,048.37/138,958.72
  6. Step 6: Final answer
    x = 97,555.60

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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.