Home / 138,180.30-190,671.87-87,173.79

Finding the Fourth Proportional to 138,180.30, 190,671.87 and 87,173.79

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Solution

The fourth proportional to 138,180.30, 190,671.87 and 87,173.79 is: 120,289.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,180.30 : 190,671.87 = 87,173.79 : x
  2. Step 2: Convert to fraction form
    138,180.30/190,671.87 = 87,173.79/x
  3. Step 3: Cross multiply
    138,180.30x = 190,671.87 × 87,173.79
  4. Step 4: Simplify right side
    138,180.30x = 16,621,589,554.29
  5. Step 5: Solve for x
    x = 16,621,589,554.29/138,180.30
  6. Step 6: Final answer
    x = 120,289.14

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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.