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Finding the Fourth Proportional to 66,582.12, 91,872.41 and 39,354.42

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Solution

The fourth proportional to 66,582.12, 91,872.41 and 39,354.42 is: 54,302.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,582.12 : 91,872.41 = 39,354.42 : x
  2. Step 2: Convert to fraction form
    66,582.12/91,872.41 = 39,354.42/x
  3. Step 3: Cross multiply
    66,582.12x = 91,872.41 × 39,354.42
  4. Step 4: Simplify right side
    66,582.12x = 3,615,585,409.55
  5. Step 5: Solve for x
    x = 3,615,585,409.55/66,582.12
  6. Step 6: Final answer
    x = 54,302.65

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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.