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Finding the Fourth Proportional to 235,170, 324,534.60 and 129,186

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Solution

The fourth proportional to 235,170, 324,534.60 and 129,186 is: 178,276.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,170 : 324,534.60 = 129,186 : x
  2. Step 2: Convert to fraction form
    235,170/324,534.60 = 129,186/x
  3. Step 3: Cross multiply
    235,170x = 324,534.60 × 129,186
  4. Step 4: Simplify right side
    235,170x = 41,925,326,835.60
  5. Step 5: Solve for x
    x = 41,925,326,835.60/235,170
  6. Step 6: Final answer
    x = 178,276.68

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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.