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Finding the Fourth Proportional to 121,448.20, 181,880.70 and 98,120.20

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Solution

The fourth proportional to 121,448.20, 181,880.70 and 98,120.20 is: 146,944.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,448.20 : 181,880.70 = 98,120.20 : x
  2. Step 2: Convert to fraction form
    121,448.20/181,880.70 = 98,120.20/x
  3. Step 3: Cross multiply
    121,448.20x = 181,880.70 × 98,120.20
  4. Step 4: Simplify right side
    121,448.20x = 17,846,170,660.14
  5. Step 5: Solve for x
    x = 17,846,170,660.14/121,448.20
  6. Step 6: Final answer
    x = 146,944.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.