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Finding the Fourth Proportional to 71,804.35, 99,087.33 and 39,972.57

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Solution

The fourth proportional to 71,804.35, 99,087.33 and 39,972.57 is: 55,160.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,804.35 : 99,087.33 = 39,972.57 : x
  2. Step 2: Convert to fraction form
    71,804.35/99,087.33 = 39,972.57/x
  3. Step 3: Cross multiply
    71,804.35x = 99,087.33 × 39,972.57
  4. Step 4: Simplify right side
    71,804.35x = 3,960,775,234.54
  5. Step 5: Solve for x
    x = 3,960,775,234.54/71,804.35
  6. Step 6: Final answer
    x = 55,160.66

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1.5x scale

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.