Home / 138,181.30-190,673.25-87,174.79

Finding the Fourth Proportional to 138,181.30, 190,673.25 and 87,174.79

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Solution

The fourth proportional to 138,181.30, 190,673.25 and 87,174.79 is: 120,290.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,181.30 : 190,673.25 = 87,174.79 : x
  2. Step 2: Convert to fraction form
    138,181.30/190,673.25 = 87,174.79/x
  3. Step 3: Cross multiply
    138,181.30x = 190,673.25 × 87,174.79
  4. Step 4: Simplify right side
    138,181.30x = 16,621,900,527.37
  5. Step 5: Solve for x
    x = 16,621,900,527.37/138,181.30
  6. Step 6: Final answer
    x = 120,290.52

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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.