Home / 136,317.21-188,083.60-81,878.52

Finding the Fourth Proportional to 136,317.21, 188,083.60 and 81,878.52

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Solution

The fourth proportional to 136,317.21, 188,083.60 and 81,878.52 is: 112,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,317.21 : 188,083.60 = 81,878.52 : x
  2. Step 2: Convert to fraction form
    136,317.21/188,083.60 = 81,878.52/x
  3. Step 3: Cross multiply
    136,317.21x = 188,083.60 × 81,878.52
  4. Step 4: Simplify right side
    136,317.21x = 15,400,007,765.46
  5. Step 5: Solve for x
    x = 15,400,007,765.46/136,317.21
  6. Step 6: Final answer
    x = 112,971.86

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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.