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Finding the Fourth Proportional to 99,699.30, 137,584.50 and 54,376.44

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Solution

The fourth proportional to 99,699.30, 137,584.50 and 54,376.44 is: 75,039.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,699.30 : 137,584.50 = 54,376.44 : x
  2. Step 2: Convert to fraction form
    99,699.30/137,584.50 = 54,376.44/x
  3. Step 3: Cross multiply
    99,699.30x = 137,584.50 × 54,376.44
  4. Step 4: Simplify right side
    99,699.30x = 7,481,355,309.18
  5. Step 5: Solve for x
    x = 7,481,355,309.18/99,699.30
  6. Step 6: Final answer
    x = 75,039.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.