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Finding the Fourth Proportional to 99,692.60, 149,320.20 and 88,611.80

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Solution

The fourth proportional to 99,692.60, 149,320.20 and 88,611.80 is: 132,723.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,692.60 : 149,320.20 = 88,611.80 : x
  2. Step 2: Convert to fraction form
    99,692.60/149,320.20 = 88,611.80/x
  3. Step 3: Cross multiply
    99,692.60x = 149,320.20 × 88,611.80
  4. Step 4: Simplify right side
    99,692.60x = 13,231,531,698.36
  5. Step 5: Solve for x
    x = 13,231,531,698.36/99,692.60
  6. Step 6: Final answer
    x = 132,723.31

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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.