Home / 138,204.80-190,705.65-87,198.29

Finding the Fourth Proportional to 138,204.80, 190,705.65 and 87,198.29

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Solution

The fourth proportional to 138,204.80, 190,705.65 and 87,198.29 is: 120,322.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,204.80 : 190,705.65 = 87,198.29 : x
  2. Step 2: Convert to fraction form
    138,204.80/190,705.65 = 87,198.29/x
  3. Step 3: Cross multiply
    138,204.80x = 190,705.65 × 87,198.29
  4. Step 4: Simplify right side
    138,204.80x = 16,629,206,573.34
  5. Step 5: Solve for x
    x = 16,629,206,573.34/138,204.80
  6. Step 6: Final answer
    x = 120,322.93

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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.