Home / 121,921.49-168,240.25-75,976.87

Finding the Fourth Proportional to 121,921.49, 168,240.25 and 75,976.87

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Solution

The fourth proportional to 121,921.49, 168,240.25 and 75,976.87 is: 104,840.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,921.49 : 168,240.25 = 75,976.87 : x
  2. Step 2: Convert to fraction form
    121,921.49/168,240.25 = 75,976.87/x
  3. Step 3: Cross multiply
    121,921.49x = 168,240.25 × 75,976.87
  4. Step 4: Simplify right side
    121,921.49x = 12,782,367,480.92
  5. Step 5: Solve for x
    x = 12,782,367,480.92/121,921.49
  6. Step 6: Final answer
    x = 104,840.97

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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.