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Finding the Fourth Proportional to 228,621.15, 315,493.77 and 126,646.31

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Solution

The fourth proportional to 228,621.15, 315,493.77 and 126,646.31 is: 174,770.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,621.15 : 315,493.77 = 126,646.31 : x
  2. Step 2: Convert to fraction form
    228,621.15/315,493.77 = 126,646.31/x
  3. Step 3: Cross multiply
    228,621.15x = 315,493.77 × 126,646.31
  4. Step 4: Simplify right side
    228,621.15x = 39,956,120,221.02
  5. Step 5: Solve for x
    x = 39,956,120,221.02/228,621.15
  6. Step 6: Final answer
    x = 174,770.01

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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.