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Finding the Fourth Proportional to 71,692.65, 98,936.51 and 39,860.73

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Solution

The fourth proportional to 71,692.65, 98,936.51 and 39,860.73 is: 55,008.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,692.65 : 98,936.51 = 39,860.73 : x
  2. Step 2: Convert to fraction form
    71,692.65/98,936.51 = 39,860.73/x
  3. Step 3: Cross multiply
    71,692.65x = 98,936.51 × 39,860.73
  4. Step 4: Simplify right side
    71,692.65x = 3,943,681,312.95
  5. Step 5: Solve for x
    x = 3,943,681,312.95/71,692.65
  6. Step 6: Final answer
    x = 55,008.17

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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.