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Finding the Fourth Proportional to 99,494.20, 149,022.60 and 79,811.20

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Solution

The fourth proportional to 99,494.20, 149,022.60 and 79,811.20 is: 119,541.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,494.20 : 149,022.60 = 79,811.20 : x
  2. Step 2: Convert to fraction form
    99,494.20/149,022.60 = 79,811.20/x
  3. Step 3: Cross multiply
    99,494.20x = 149,022.60 × 79,811.20
  4. Step 4: Simplify right side
    99,494.20x = 11,893,672,533.12
  5. Step 5: Solve for x
    x = 11,893,672,533.12/99,494.20
  6. Step 6: Final answer
    x = 119,541.37

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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.