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Finding the Fourth Proportional to 136,369.42, 188,189.76 and 79,791.74

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Solution

The fourth proportional to 136,369.42, 188,189.76 and 79,791.74 is: 110,112.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,369.42 : 188,189.76 = 79,791.74 : x
  2. Step 2: Convert to fraction form
    136,369.42/188,189.76 = 79,791.74/x
  3. Step 3: Cross multiply
    136,369.42x = 188,189.76 × 79,791.74
  4. Step 4: Simplify right side
    136,369.42x = 15,015,988,400.58
  5. Step 5: Solve for x
    x = 15,015,988,400.58/136,369.42
  6. Step 6: Final answer
    x = 110,112.58

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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.