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Finding the Fourth Proportional to 216,100.20, 323,874.90 and 121,330.20

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Solution

The fourth proportional to 216,100.20, 323,874.90 and 121,330.20 is: 181,840.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,100.20 : 323,874.90 = 121,330.20 : x
  2. Step 2: Convert to fraction form
    216,100.20/323,874.90 = 121,330.20/x
  3. Step 3: Cross multiply
    216,100.20x = 323,874.90 × 121,330.20
  4. Step 4: Simplify right side
    216,100.20x = 39,295,806,391.98
  5. Step 5: Solve for x
    x = 39,295,806,391.98/216,100.20
  6. Step 6: Final answer
    x = 181,840.68

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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.