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Finding the Fourth Proportional to 66,842.44, 92,242.56 and 39,986.08

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Solution

The fourth proportional to 66,842.44, 92,242.56 and 39,986.08 is: 55,180.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,842.44 : 92,242.56 = 39,986.08 : x
  2. Step 2: Convert to fraction form
    66,842.44/92,242.56 = 39,986.08/x
  3. Step 3: Cross multiply
    66,842.44x = 92,242.56 × 39,986.08
  4. Step 4: Simplify right side
    66,842.44x = 3,688,418,302.91
  5. Step 5: Solve for x
    x = 3,688,418,302.91/66,842.44
  6. Step 6: Final answer
    x = 55,180.79

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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.