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Finding the Fourth Proportional to 126,230.40, 189,491.40 and 76,366.80

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Solution

The fourth proportional to 126,230.40, 189,491.40 and 76,366.80 is: 114,638.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,230.40 : 189,491.40 = 76,366.80 : x
  2. Step 2: Convert to fraction form
    126,230.40/189,491.40 = 76,366.80/x
  3. Step 3: Cross multiply
    126,230.40x = 189,491.40 × 76,366.80
  4. Step 4: Simplify right side
    126,230.40x = 14,470,851,845.52
  5. Step 5: Solve for x
    x = 14,470,851,845.52/126,230.40
  6. Step 6: Final answer
    x = 114,638.41

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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.