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Finding the Fourth Proportional to 136,678.80, 204,629.40 and 121,126.80

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Solution

The fourth proportional to 136,678.80, 204,629.40 and 121,126.80 is: 181,345.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,678.80 : 204,629.40 = 121,126.80 : x
  2. Step 2: Convert to fraction form
    136,678.80/204,629.40 = 121,126.80/x
  3. Step 3: Cross multiply
    136,678.80x = 204,629.40 × 121,126.80
  4. Step 4: Simplify right side
    136,678.80x = 24,786,104,407.92
  5. Step 5: Solve for x
    x = 24,786,104,407.92/136,678.80
  6. Step 6: Final answer
    x = 181,345.64

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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.