Home / 99,742.25-149,683.55-90,213.62

Finding the Fourth Proportional to 99,742.25, 149,683.55 and 90,213.62

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Solution

The fourth proportional to 99,742.25, 149,683.55 and 90,213.62 is: 135,383.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,742.25 : 149,683.55 = 90,213.62 : x
  2. Step 2: Convert to fraction form
    99,742.25/149,683.55 = 90,213.62/x
  3. Step 3: Cross multiply
    99,742.25x = 149,683.55 × 90,213.62
  4. Step 4: Simplify right side
    99,742.25x = 13,503,493,700.47
  5. Step 5: Solve for x
    x = 13,503,493,700.47/99,742.25
  6. Step 6: Final answer
    x = 135,383.89

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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.