Home / 135,120.78-186,450.50-74,683.23

Finding the Fourth Proportional to 135,120.78, 186,450.50 and 74,683.23

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Solution

The fourth proportional to 135,120.78, 186,450.50 and 74,683.23 is: 103,053.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,120.78 : 186,450.50 = 74,683.23 : x
  2. Step 2: Convert to fraction form
    135,120.78/186,450.50 = 74,683.23/x
  3. Step 3: Cross multiply
    135,120.78x = 186,450.50 × 74,683.23
  4. Step 4: Simplify right side
    135,120.78x = 13,924,725,201.70
  5. Step 5: Solve for x
    x = 13,924,725,201.70/135,120.78
  6. Step 6: Final answer
    x = 103,053.91

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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.