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Finding the Fourth Proportional to 99,428.40, 149,027.40 and 40,234.80

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Solution

The fourth proportional to 99,428.40, 149,027.40 and 40,234.80 is: 60,305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.40 : 149,027.40 = 40,234.80 : x
  2. Step 2: Convert to fraction form
    99,428.40/149,027.40 = 40,234.80/x
  3. Step 3: Cross multiply
    99,428.40x = 149,027.40 × 40,234.80
  4. Step 4: Simplify right side
    99,428.40x = 5,996,087,633.52
  5. Step 5: Solve for x
    x = 5,996,087,633.52/99,428.40
  6. Step 6: Final answer
    x = 60,305.58

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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.