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Finding the Fourth Proportional to 216,572.75, 324,225.63 and 126,339.56

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Solution

The fourth proportional to 216,572.75, 324,225.63 and 126,339.56 is: 189,139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,572.75 : 324,225.63 = 126,339.56 : x
  2. Step 2: Convert to fraction form
    216,572.75/324,225.63 = 126,339.56/x
  3. Step 3: Cross multiply
    216,572.75x = 324,225.63 × 126,339.56
  4. Step 4: Simplify right side
    216,572.75x = 40,962,521,813.79
  5. Step 5: Solve for x
    x = 40,962,521,813.79/216,572.75
  6. Step 6: Final answer
    x = 189,139.78

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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.