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Finding the Fourth Proportional to 166,978.60, 250,550.03 and 78,216.76

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Solution

The fourth proportional to 166,978.60, 250,550.03 and 78,216.76 is: 117,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,978.60 : 250,550.03 = 78,216.76 : x
  2. Step 2: Convert to fraction form
    166,978.60/250,550.03 = 78,216.76/x
  3. Step 3: Cross multiply
    166,978.60x = 250,550.03 × 78,216.76
  4. Step 4: Simplify right side
    166,978.60x = 19,597,210,507.29
  5. Step 5: Solve for x
    x = 19,597,210,507.29/166,978.60
  6. Step 6: Final answer
    x = 117,363.61

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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.