Home / 71,638.35-98,858.94-39,806.43

Finding the Fourth Proportional to 71,638.35, 98,858.94 and 39,806.43

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Solution

The fourth proportional to 71,638.35, 98,858.94 and 39,806.43 is: 54,931.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,638.35 : 98,858.94 = 39,806.43 : x
  2. Step 2: Convert to fraction form
    71,638.35/98,858.94 = 39,806.43/x
  3. Step 3: Cross multiply
    71,638.35x = 98,858.94 × 39,806.43
  4. Step 4: Simplify right side
    71,638.35x = 3,935,221,474.98
  5. Step 5: Solve for x
    x = 3,935,221,474.98/71,638.35
  6. Step 6: Final answer
    x = 54,931.77

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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.