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Finding the Fourth Proportional to 216,363.12, 324,475.42 and 72,238

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Solution

The fourth proportional to 216,363.12, 324,475.42 and 72,238 is: 108,333.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,363.12 : 324,475.42 = 72,238 : x
  2. Step 2: Convert to fraction form
    216,363.12/324,475.42 = 72,238/x
  3. Step 3: Cross multiply
    216,363.12x = 324,475.42 × 72,238
  4. Step 4: Simplify right side
    216,363.12x = 23,439,455,389.96
  5. Step 5: Solve for x
    x = 23,439,455,389.96/216,363.12
  6. Step 6: Final answer
    x = 108,333.88

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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.