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Finding the Fourth Proportional to 228,683.21, 315,578.61 and 126,708.29

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Solution

The fourth proportional to 228,683.21, 315,578.61 and 126,708.29 is: 174,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,683.21 : 315,578.61 = 126,708.29 : x
  2. Step 2: Convert to fraction form
    228,683.21/315,578.61 = 126,708.29/x
  3. Step 3: Cross multiply
    228,683.21x = 315,578.61 × 126,708.29
  4. Step 4: Simplify right side
    228,683.21x = 39,986,424,455.78
  5. Step 5: Solve for x
    x = 39,986,424,455.78/228,683.21
  6. Step 6: Final answer
    x = 174,855.10

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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.