Home / 135,131.54-186,495.12-74,706.78

Finding the Fourth Proportional to 135,131.54, 186,495.12 and 74,706.78

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Solution

The fourth proportional to 135,131.54, 186,495.12 and 74,706.78 is: 103,102.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,131.54 : 186,495.12 = 74,706.78 : x
  2. Step 2: Convert to fraction form
    135,131.54/186,495.12 = 74,706.78/x
  3. Step 3: Cross multiply
    135,131.54x = 186,495.12 × 74,706.78
  4. Step 4: Simplify right side
    135,131.54x = 13,932,449,900.91
  5. Step 5: Solve for x
    x = 13,932,449,900.91/135,131.54
  6. Step 6: Final answer
    x = 103,102.87

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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.