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Finding the Fourth Proportional to 71,692.83, 98,935.88 and 39,861.72

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Solution

The fourth proportional to 71,692.83, 98,935.88 and 39,861.72 is: 55,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,692.83 : 98,935.88 = 39,861.72 : x
  2. Step 2: Convert to fraction form
    71,692.83/98,935.88 = 39,861.72/x
  3. Step 3: Cross multiply
    71,692.83x = 98,935.88 × 39,861.72
  4. Step 4: Simplify right side
    71,692.83x = 3,943,754,147.21
  5. Step 5: Solve for x
    x = 3,943,754,147.21/71,692.83
  6. Step 6: Final answer
    x = 55,009.05

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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.