Home / 138,418.12-190,817.94-98,605

Finding the Fourth Proportional to 138,418.12, 190,817.94 and 98,605

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Solution

The fourth proportional to 138,418.12, 190,817.94 and 98,605 is: 135,933.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,418.12 : 190,817.94 = 98,605 : x
  2. Step 2: Convert to fraction form
    138,418.12/190,817.94 = 98,605/x
  3. Step 3: Cross multiply
    138,418.12x = 190,817.94 × 98,605
  4. Step 4: Simplify right side
    138,418.12x = 18,815,602,973.70
  5. Step 5: Solve for x
    x = 18,815,602,973.70/138,418.12
  6. Step 6: Final answer
    x = 135,933.09

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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.