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Finding the Fourth Proportional to 163,431.91, 225,511.48 and 91,798.21

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Solution

The fourth proportional to 163,431.91, 225,511.48 and 91,798.21 is: 126,667.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,431.91 : 225,511.48 = 91,798.21 : x
  2. Step 2: Convert to fraction form
    163,431.91/225,511.48 = 91,798.21/x
  3. Step 3: Cross multiply
    163,431.91x = 225,511.48 × 91,798.21
  4. Step 4: Simplify right side
    163,431.91x = 20,701,550,198.45
  5. Step 5: Solve for x
    x = 20,701,550,198.45/163,431.91
  6. Step 6: Final answer
    x = 126,667.74

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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.