Home / 121,928.94-168,319.48-91,725.78

Finding the Fourth Proportional to 121,928.94, 168,319.48 and 91,725.78

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Solution

The fourth proportional to 121,928.94, 168,319.48 and 91,725.78 is: 126,624.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,928.94 : 168,319.48 = 91,725.78 : x
  2. Step 2: Convert to fraction form
    121,928.94/168,319.48 = 91,725.78/x
  3. Step 3: Cross multiply
    121,928.94x = 168,319.48 × 91,725.78
  4. Step 4: Simplify right side
    121,928.94x = 15,439,235,592.19
  5. Step 5: Solve for x
    x = 15,439,235,592.19/121,928.94
  6. Step 6: Final answer
    x = 126,624.87

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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.