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Finding the Fourth Proportional to 228,358.58, 315,138.78 and 126,392.45

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Solution

The fourth proportional to 228,358.58, 315,138.78 and 126,392.45 is: 174,423.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,358.58 : 315,138.78 = 126,392.45 : x
  2. Step 2: Convert to fraction form
    228,358.58/315,138.78 = 126,392.45/x
  3. Step 3: Cross multiply
    228,358.58x = 315,138.78 × 126,392.45
  4. Step 4: Simplify right side
    228,358.58x = 39,831,160,918.52
  5. Step 5: Solve for x
    x = 39,831,160,918.52/228,358.58
  6. Step 6: Final answer
    x = 174,423.76

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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.