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Finding the Fourth Proportional to 84,361.82, 126,605.32 and 39,988.66

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Solution

The fourth proportional to 84,361.82, 126,605.32 and 39,988.66 is: 60,012.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,361.82 : 126,605.32 = 39,988.66 : x
  2. Step 2: Convert to fraction form
    84,361.82/126,605.32 = 39,988.66/x
  3. Step 3: Cross multiply
    84,361.82x = 126,605.32 × 39,988.66
  4. Step 4: Simplify right side
    84,361.82x = 5,062,777,095.67
  5. Step 5: Solve for x
    x = 5,062,777,095.67/84,361.82
  6. Step 6: Final answer
    x = 60,012.66

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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.