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Finding the Fourth Proportional to 66,489.03, 91,742.31 and 39,634.03

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Solution

The fourth proportional to 66,489.03, 91,742.31 and 39,634.03 is: 54,687.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.03 : 91,742.31 = 39,634.03 : x
  2. Step 2: Convert to fraction form
    66,489.03/91,742.31 = 39,634.03/x
  3. Step 3: Cross multiply
    66,489.03x = 91,742.31 × 39,634.03
  4. Step 4: Simplify right side
    66,489.03x = 3,636,117,466.81
  5. Step 5: Solve for x
    x = 3,636,117,466.81/66,489.03
  6. Step 6: Final answer
    x = 54,687.48

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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.