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Finding the Fourth Proportional to 228,688.25, 315,585.72 and 126,711.68

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Solution

The fourth proportional to 228,688.25, 315,585.72 and 126,711.68 is: 174,859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,688.25 : 315,585.72 = 126,711.68 : x
  2. Step 2: Convert to fraction form
    228,688.25/315,585.72 = 126,711.68/x
  3. Step 3: Cross multiply
    228,688.25x = 315,585.72 × 126,711.68
  4. Step 4: Simplify right side
    228,688.25x = 39,988,395,187.28
  5. Step 5: Solve for x
    x = 39,988,395,187.28/228,688.25
  6. Step 6: Final answer
    x = 174,859.86

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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.