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Finding the Fourth Proportional to 71,643.41, 98,863.37 and 39,810.41

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Solution

The fourth proportional to 71,643.41, 98,863.37 and 39,810.41 is: 54,935.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.41 : 98,863.37 = 39,810.41 : x
  2. Step 2: Convert to fraction form
    71,643.41/98,863.37 = 39,810.41/x
  3. Step 3: Cross multiply
    71,643.41x = 98,863.37 × 39,810.41
  4. Step 4: Simplify right side
    71,643.41x = 3,935,790,600.31
  5. Step 5: Solve for x
    x = 3,935,790,600.31/71,643.41
  6. Step 6: Final answer
    x = 54,935.84

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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.