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Finding the Fourth Proportional to 228,543.70, 315,418.50 and 137,951.68

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Solution

The fourth proportional to 228,543.70, 315,418.50 and 137,951.68 is: 190,390.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,543.70 : 315,418.50 = 137,951.68 : x
  2. Step 2: Convert to fraction form
    228,543.70/315,418.50 = 137,951.68/x
  3. Step 3: Cross multiply
    228,543.70x = 315,418.50 × 137,951.68
  4. Step 4: Simplify right side
    228,543.70x = 43,512,511,978.08
  5. Step 5: Solve for x
    x = 43,512,511,978.08/228,543.70
  6. Step 6: Final answer
    x = 190,390.34

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1.5x scale

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.