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Finding the Fourth Proportional to 216,285.42, 324,428.89 and 66,524.70

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Solution

The fourth proportional to 216,285.42, 324,428.89 and 66,524.70 is: 99,787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,285.42 : 324,428.89 = 66,524.70 : x
  2. Step 2: Convert to fraction form
    216,285.42/324,428.89 = 66,524.70/x
  3. Step 3: Cross multiply
    216,285.42x = 324,428.89 × 66,524.70
  4. Step 4: Simplify right side
    216,285.42x = 21,582,533,294.02
  5. Step 5: Solve for x
    x = 21,582,533,294.02/216,285.42
  6. Step 6: Final answer
    x = 99,787.28

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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.