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Finding the Fourth Proportional to 163,489.32, 225,620.94 and 91,867.86

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Solution

The fourth proportional to 163,489.32, 225,620.94 and 91,867.86 is: 126,780.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,489.32 : 225,620.94 = 91,867.86 : x
  2. Step 2: Convert to fraction form
    163,489.32/225,620.94 = 91,867.86/x
  3. Step 3: Cross multiply
    163,489.32x = 225,620.94 × 91,867.86
  4. Step 4: Simplify right side
    163,489.32x = 20,727,312,928.99
  5. Step 5: Solve for x
    x = 20,727,312,928.99/163,489.32
  6. Step 6: Final answer
    x = 126,780.84

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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.