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Finding the Fourth Proportional to 111,081.51, 153,133.07 and 79,195.05

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Solution

The fourth proportional to 111,081.51, 153,133.07 and 79,195.05 is: 109,175.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,081.51 : 153,133.07 = 79,195.05 : x
  2. Step 2: Convert to fraction form
    111,081.51/153,133.07 = 79,195.05/x
  3. Step 3: Cross multiply
    111,081.51x = 153,133.07 × 79,195.05
  4. Step 4: Simplify right side
    111,081.51x = 12,127,380,739.33
  5. Step 5: Solve for x
    x = 12,127,380,739.33/111,081.51
  6. Step 6: Final answer
    x = 109,175.51

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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.