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Finding the Fourth Proportional to 76,960, 115,355.94 and 48,892.60

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Solution

The fourth proportional to 76,960, 115,355.94 and 48,892.60 is: 73,285.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,960 : 115,355.94 = 48,892.60 : x
  2. Step 2: Convert to fraction form
    76,960/115,355.94 = 48,892.60/x
  3. Step 3: Cross multiply
    76,960x = 115,355.94 × 48,892.60
  4. Step 4: Simplify right side
    76,960x = 5,640,051,832.04
  5. Step 5: Solve for x
    x = 5,640,051,832.04/76,960
  6. Step 6: Final answer
    x = 73,285.50

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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.