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Finding the Fourth Proportional to 76,910.80, 115,171.80 and 50,472.40

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Solution

The fourth proportional to 76,910.80, 115,171.80 and 50,472.40 is: 75,581.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,910.80 : 115,171.80 = 50,472.40 : x
  2. Step 2: Convert to fraction form
    76,910.80/115,171.80 = 50,472.40/x
  3. Step 3: Cross multiply
    76,910.80x = 115,171.80 × 50,472.40
  4. Step 4: Simplify right side
    76,910.80x = 5,812,997,158.32
  5. Step 5: Solve for x
    x = 5,812,997,158.32/76,910.80
  6. Step 6: Final answer
    x = 75,581.03

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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.