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Finding the Fourth Proportional to 129,699.60, 194,405.40 and 50,787.60

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Solution

The fourth proportional to 129,699.60, 194,405.40 and 50,787.60 is: 76,125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,699.60 : 194,405.40 = 50,787.60 : x
  2. Step 2: Convert to fraction form
    129,699.60/194,405.40 = 50,787.60/x
  3. Step 3: Cross multiply
    129,699.60x = 194,405.40 × 50,787.60
  4. Step 4: Simplify right side
    129,699.60x = 9,873,383,693.04
  5. Step 5: Solve for x
    x = 9,873,383,693.04/129,699.60
  6. Step 6: Final answer
    x = 76,125.01

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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.