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Finding the Fourth Proportional to 71,043.42, 98,039.43 and 39,212.31

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Solution

The fourth proportional to 71,043.42, 98,039.43 and 39,212.31 is: 54,112.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,043.42 : 98,039.43 = 39,212.31 : x
  2. Step 2: Convert to fraction form
    71,043.42/98,039.43 = 39,212.31/x
  3. Step 3: Cross multiply
    71,043.42x = 98,039.43 × 39,212.31
  4. Step 4: Simplify right side
    71,043.42x = 3,844,352,521.38
  5. Step 5: Solve for x
    x = 3,844,352,521.38/71,043.42
  6. Step 6: Final answer
    x = 54,112.72

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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.