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Finding the Fourth Proportional to 166,086, 249,131.28 and 55,278

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Solution

The fourth proportional to 166,086, 249,131.28 and 55,278 is: 82,917.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,086 : 249,131.28 = 55,278 : x
  2. Step 2: Convert to fraction form
    166,086/249,131.28 = 55,278/x
  3. Step 3: Cross multiply
    166,086x = 249,131.28 × 55,278
  4. Step 4: Simplify right side
    166,086x = 13,771,478,895.84
  5. Step 5: Solve for x
    x = 13,771,478,895.84/166,086
  6. Step 6: Final answer
    x = 82,917.76

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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.