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Finding the Fourth Proportional to 64,815.54, 89,450.64 and 36,144.57

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Solution

The fourth proportional to 64,815.54, 89,450.64 and 36,144.57 is: 49,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,815.54 : 89,450.64 = 36,144.57 : x
  2. Step 2: Convert to fraction form
    64,815.54/89,450.64 = 36,144.57/x
  3. Step 3: Cross multiply
    64,815.54x = 89,450.64 × 36,144.57
  4. Step 4: Simplify right side
    64,815.54x = 3,233,154,919.02
  5. Step 5: Solve for x
    x = 3,233,154,919.02/64,815.54
  6. Step 6: Final answer
    x = 49,882.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.