Home / 138,204.30-190,704.96-87,197.79

Finding the Fourth Proportional to 138,204.30, 190,704.96 and 87,197.79

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Solution

The fourth proportional to 138,204.30, 190,704.96 and 87,197.79 is: 120,322.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,204.30 : 190,704.96 = 87,197.79 : x
  2. Step 2: Convert to fraction form
    138,204.30/190,704.96 = 87,197.79/x
  3. Step 3: Cross multiply
    138,204.30x = 190,704.96 × 87,197.79
  4. Step 4: Simplify right side
    138,204.30x = 16,629,051,054.04
  5. Step 5: Solve for x
    x = 16,629,051,054.04/138,204.30
  6. Step 6: Final answer
    x = 120,322.24

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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.