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Finding the Fourth Proportional to 71,958.02, 99,299.74 and 39,692.57

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Solution

The fourth proportional to 71,958.02, 99,299.74 and 39,692.57 is: 54,774.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.02 : 99,299.74 = 39,692.57 : x
  2. Step 2: Convert to fraction form
    71,958.02/99,299.74 = 39,692.57/x
  3. Step 3: Cross multiply
    71,958.02x = 99,299.74 × 39,692.57
  4. Step 4: Simplify right side
    71,958.02x = 3,941,461,359.63
  5. Step 5: Solve for x
    x = 3,941,461,359.63/71,958.02
  6. Step 6: Final answer
    x = 54,774.45

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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.