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Finding the Fourth Proportional to 99,443.20, 149,164.80 and 76,892.80

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Solution

The fourth proportional to 99,443.20, 149,164.80 and 76,892.80 is: 115,339.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,443.20 : 149,164.80 = 76,892.80 : x
  2. Step 2: Convert to fraction form
    99,443.20/149,164.80 = 76,892.80/x
  3. Step 3: Cross multiply
    99,443.20x = 149,164.80 × 76,892.80
  4. Step 4: Simplify right side
    99,443.20x = 11,469,699,133.44
  5. Step 5: Solve for x
    x = 11,469,699,133.44/99,443.20
  6. Step 6: Final answer
    x = 115,339.20

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1.5x scale

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.