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Finding the Fourth Proportional to 126,728.90, 174,894 and 73,012.94

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Solution

The fourth proportional to 126,728.90, 174,894 and 73,012.94 is: 100,762.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,728.90 : 174,894 = 73,012.94 : x
  2. Step 2: Convert to fraction form
    126,728.90/174,894 = 73,012.94/x
  3. Step 3: Cross multiply
    126,728.90x = 174,894 × 73,012.94
  4. Step 4: Simplify right side
    126,728.90x = 12,769,525,128.36
  5. Step 5: Solve for x
    x = 12,769,525,128.36/126,728.90
  6. Step 6: Final answer
    x = 100,762.53

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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.