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Finding the Fourth Proportional to 235,451.42, 324,921.26 and 128,021.42

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Solution

The fourth proportional to 235,451.42, 324,921.26 and 128,021.42 is: 176,668.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,451.42 : 324,921.26 = 128,021.42 : x
  2. Step 2: Convert to fraction form
    235,451.42/324,921.26 = 128,021.42/x
  3. Step 3: Cross multiply
    235,451.42x = 324,921.26 × 128,021.42
  4. Step 4: Simplify right side
    235,451.42x = 41,596,881,093.39
  5. Step 5: Solve for x
    x = 41,596,881,093.39/235,451.42
  6. Step 6: Final answer
    x = 176,668.64

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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.