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Finding the Fourth Proportional to 236,787.60, 355,165.20 and 76,861.20

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Solution

The fourth proportional to 236,787.60, 355,165.20 and 76,861.20 is: 115,286.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,787.60 : 355,165.20 = 76,861.20 : x
  2. Step 2: Convert to fraction form
    236,787.60/355,165.20 = 76,861.20/x
  3. Step 3: Cross multiply
    236,787.60x = 355,165.20 × 76,861.20
  4. Step 4: Simplify right side
    236,787.60x = 27,298,423,470.24
  5. Step 5: Solve for x
    x = 27,298,423,470.24/236,787.60
  6. Step 6: Final answer
    x = 115,286.54

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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.