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Finding the Fourth Proportional to 99,603.10, 149,489.70 and 40,481.20

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Solution

The fourth proportional to 99,603.10, 149,489.70 and 40,481.20 is: 60,756.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,603.10 : 149,489.70 = 40,481.20 : x
  2. Step 2: Convert to fraction form
    99,603.10/149,489.70 = 40,481.20/x
  3. Step 3: Cross multiply
    99,603.10x = 149,489.70 × 40,481.20
  4. Step 4: Simplify right side
    99,603.10x = 6,051,522,443.64
  5. Step 5: Solve for x
    x = 6,051,522,443.64/99,603.10
  6. Step 6: Final answer
    x = 60,756.37

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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.