Home / 135,635.31-187,215.71-81,911.25

Finding the Fourth Proportional to 135,635.31, 187,215.71 and 81,911.25

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Solution

The fourth proportional to 135,635.31, 187,215.71 and 81,911.25 is: 113,061.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,635.31 : 187,215.71 = 81,911.25 : x
  2. Step 2: Convert to fraction form
    135,635.31/187,215.71 = 81,911.25/x
  3. Step 3: Cross multiply
    135,635.31x = 187,215.71 × 81,911.25
  4. Step 4: Simplify right side
    135,635.31x = 15,335,072,416.18
  5. Step 5: Solve for x
    x = 15,335,072,416.18/135,635.31
  6. Step 6: Final answer
    x = 113,061.06

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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.