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Finding the Fourth Proportional to 216,315.46, 324,484.74 and 66,658.54

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Solution

The fourth proportional to 216,315.46, 324,484.74 and 66,658.54 is: 99,991.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,315.46 : 324,484.74 = 66,658.54 : x
  2. Step 2: Convert to fraction form
    216,315.46/324,484.74 = 66,658.54/x
  3. Step 3: Cross multiply
    216,315.46x = 324,484.74 × 66,658.54
  4. Step 4: Simplify right side
    216,315.46x = 21,629,679,020.68
  5. Step 5: Solve for x
    x = 21,629,679,020.68/216,315.46
  6. Step 6: Final answer
    x = 99,991.37

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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.