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Finding the Fourth Proportional to 228,705.75, 315,609.21 and 126,730.33

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Solution

The fourth proportional to 228,705.75, 315,609.21 and 126,730.33 is: 174,885.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,705.75 : 315,609.21 = 126,730.33 : x
  2. Step 2: Convert to fraction form
    228,705.75/315,609.21 = 126,730.33/x
  3. Step 3: Cross multiply
    228,705.75x = 315,609.21 × 126,730.33
  4. Step 4: Simplify right side
    228,705.75x = 39,997,259,334.34
  5. Step 5: Solve for x
    x = 39,997,259,334.34/228,705.75
  6. Step 6: Final answer
    x = 174,885.24

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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.