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Finding the Fourth Proportional to 228,611.16, 315,485.94 and 126,638.19

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Solution

The fourth proportional to 228,611.16, 315,485.94 and 126,638.19 is: 174,762.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,611.16 : 315,485.94 = 126,638.19 : x
  2. Step 2: Convert to fraction form
    228,611.16/315,485.94 = 126,638.19/x
  3. Step 3: Cross multiply
    228,611.16x = 315,485.94 × 126,638.19
  4. Step 4: Simplify right side
    228,611.16x = 39,952,568,412.05
  5. Step 5: Solve for x
    x = 39,952,568,412.05/228,611.16
  6. Step 6: Final answer
    x = 174,762.11

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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.