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Finding the Fourth Proportional to 99,692.10, 149,246.55 and 66,449.70

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Solution

The fourth proportional to 99,692.10, 149,246.55 and 66,449.70 is: 99,480.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,692.10 : 149,246.55 = 66,449.70 : x
  2. Step 2: Convert to fraction form
    99,692.10/149,246.55 = 66,449.70/x
  3. Step 3: Cross multiply
    99,692.10x = 149,246.55 × 66,449.70
  4. Step 4: Simplify right side
    99,692.10x = 9,917,388,473.54
  5. Step 5: Solve for x
    x = 9,917,388,473.54/99,692.10
  6. Step 6: Final answer
    x = 99,480.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.