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Finding the Fourth Proportional to 99,425.40, 149,022.90 and 40,231.80

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Solution

The fourth proportional to 99,425.40, 149,022.90 and 40,231.80 is: 60,301.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,425.40 : 149,022.90 = 40,231.80 : x
  2. Step 2: Convert to fraction form
    99,425.40/149,022.90 = 40,231.80/x
  3. Step 3: Cross multiply
    99,425.40x = 149,022.90 × 40,231.80
  4. Step 4: Simplify right side
    99,425.40x = 5,995,459,508.22
  5. Step 5: Solve for x
    x = 5,995,459,508.22/99,425.40
  6. Step 6: Final answer
    x = 60,301.09

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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.