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Finding the Fourth Proportional to 71,692.45, 98,935.06 and 39,861.07

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Solution

The fourth proportional to 71,692.45, 98,935.06 and 39,861.07 is: 55,007.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,692.45 : 98,935.06 = 39,861.07 : x
  2. Step 2: Convert to fraction form
    71,692.45/98,935.06 = 39,861.07/x
  3. Step 3: Cross multiply
    71,692.45x = 98,935.06 × 39,861.07
  4. Step 4: Simplify right side
    71,692.45x = 3,943,657,352.11
  5. Step 5: Solve for x
    x = 3,943,657,352.11/71,692.45
  6. Step 6: Final answer
    x = 55,007.99

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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.