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Finding the Fourth Proportional to 71,692.08, 98,934.84 and 39,860.97

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Solution

The fourth proportional to 71,692.08, 98,934.84 and 39,860.97 is: 55,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,692.08 : 98,934.84 = 39,860.97 : x
  2. Step 2: Convert to fraction form
    71,692.08/98,934.84 = 39,860.97/x
  3. Step 3: Cross multiply
    71,692.08x = 98,934.84 × 39,860.97
  4. Step 4: Simplify right side
    71,692.08x = 3,943,638,689.19
  5. Step 5: Solve for x
    x = 3,943,638,689.19/71,692.08
  6. Step 6: Final answer
    x = 55,008.01

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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.