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Finding the Fourth Proportional to 99,690.60, 149,317.20 and 88,609.80

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Solution

The fourth proportional to 99,690.60, 149,317.20 and 88,609.80 is: 132,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690.60 : 149,317.20 = 88,609.80 : x
  2. Step 2: Convert to fraction form
    99,690.60/149,317.20 = 88,609.80/x
  3. Step 3: Cross multiply
    99,690.60x = 149,317.20 × 88,609.80
  4. Step 4: Simplify right side
    99,690.60x = 13,230,967,228.56
  5. Step 5: Solve for x
    x = 13,230,967,228.56/99,690.60
  6. Step 6: Final answer
    x = 132,720.31

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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.