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Finding the Fourth Proportional to 166,978.60, 230,429.94 and 90,499.96

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Solution

The fourth proportional to 166,978.60, 230,429.94 and 90,499.96 is: 124,889.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,978.60 : 230,429.94 = 90,499.96 : x
  2. Step 2: Convert to fraction form
    166,978.60/230,429.94 = 90,499.96/x
  3. Step 3: Cross multiply
    166,978.60x = 230,429.94 × 90,499.96
  4. Step 4: Simplify right side
    166,978.60x = 20,853,900,352.80
  5. Step 5: Solve for x
    x = 20,853,900,352.80/166,978.60
  6. Step 6: Final answer
    x = 124,889.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.