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Finding the Fourth Proportional to 126,672.96, 189,630.78 and 76,601.58

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Solution

The fourth proportional to 126,672.96, 189,630.78 and 76,601.58 is: 114,673.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,672.96 : 189,630.78 = 76,601.58 : x
  2. Step 2: Convert to fraction form
    126,672.96/189,630.78 = 76,601.58/x
  3. Step 3: Cross multiply
    126,672.96x = 189,630.78 × 76,601.58
  4. Step 4: Simplify right side
    126,672.96x = 14,526,017,364.63
  5. Step 5: Solve for x
    x = 14,526,017,364.63/126,672.96
  6. Step 6: Final answer
    x = 114,673.39

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1.5x scale

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.