Home / 126,912.40-190,138.20-103,411.60

Finding the Fourth Proportional to 126,912.40, 190,138.20 and 103,411.60

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Solution

The fourth proportional to 126,912.40, 190,138.20 and 103,411.60 is: 154,929.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,912.40 : 190,138.20 = 103,411.60 : x
  2. Step 2: Convert to fraction form
    126,912.40/190,138.20 = 103,411.60/x
  3. Step 3: Cross multiply
    126,912.40x = 190,138.20 × 103,411.60
  4. Step 4: Simplify right side
    126,912.40x = 19,662,495,483.12
  5. Step 5: Solve for x
    x = 19,662,495,483.12/126,912.40
  6. Step 6: Final answer
    x = 154,929.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.