Home / 138,278.21-207,481.86-71,682.01

Finding the Fourth Proportional to 138,278.21, 207,481.86 and 71,682.01

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Solution

The fourth proportional to 138,278.21, 207,481.86 and 71,682.01 is: 107,556.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,278.21 : 207,481.86 = 71,682.01 : x
  2. Step 2: Convert to fraction form
    138,278.21/207,481.86 = 71,682.01/x
  3. Step 3: Cross multiply
    138,278.21x = 207,481.86 × 71,682.01
  4. Step 4: Simplify right side
    138,278.21x = 14,872,716,763.34
  5. Step 5: Solve for x
    x = 14,872,716,763.34/138,278.21
  6. Step 6: Final answer
    x = 107,556.47

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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.