Home / 126,916.40-190,144.20-103,415.60

Finding the Fourth Proportional to 126,916.40, 190,144.20 and 103,415.60

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Solution

The fourth proportional to 126,916.40, 190,144.20 and 103,415.60 is: 154,935.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,916.40 : 190,144.20 = 103,415.60 : x
  2. Step 2: Convert to fraction form
    126,916.40/190,144.20 = 103,415.60/x
  3. Step 3: Cross multiply
    126,916.40x = 190,144.20 × 103,415.60
  4. Step 4: Simplify right side
    126,916.40x = 19,663,876,529.52
  5. Step 5: Solve for x
    x = 19,663,876,529.52/126,916.40
  6. Step 6: Final answer
    x = 154,935.66

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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.