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Finding the Fourth Proportional to 228,611.50, 315,486.39 and 126,638.52

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Solution

The fourth proportional to 228,611.50, 315,486.39 and 126,638.52 is: 174,762.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,611.50 : 315,486.39 = 126,638.52 : x
  2. Step 2: Convert to fraction form
    228,611.50/315,486.39 = 126,638.52/x
  3. Step 3: Cross multiply
    228,611.50x = 315,486.39 × 126,638.52
  4. Step 4: Simplify right side
    228,611.50x = 39,952,729,509.74
  5. Step 5: Solve for x
    x = 39,952,729,509.74/228,611.50
  6. Step 6: Final answer
    x = 174,762.56

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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.