Home / 135,638.31-187,219.85-81,914.25

Finding the Fourth Proportional to 135,638.31, 187,219.85 and 81,914.25

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Solution

The fourth proportional to 135,638.31, 187,219.85 and 81,914.25 is: 113,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,638.31 : 187,219.85 = 81,914.25 : x
  2. Step 2: Convert to fraction form
    135,638.31/187,219.85 = 81,914.25/x
  3. Step 3: Cross multiply
    135,638.31x = 187,219.85 × 81,914.25
  4. Step 4: Simplify right side
    135,638.31x = 15,335,973,188.29
  5. Step 5: Solve for x
    x = 15,335,973,188.29/135,638.31
  6. Step 6: Final answer
    x = 113,065.20

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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.