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Finding the Fourth Proportional to 121,006.71, 166,988.61 and 67,288.59

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Solution

The fourth proportional to 121,006.71, 166,988.61 and 67,288.59 is: 92,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,006.71 : 166,988.61 = 67,288.59 : x
  2. Step 2: Convert to fraction form
    121,006.71/166,988.61 = 67,288.59/x
  3. Step 3: Cross multiply
    121,006.71x = 166,988.61 × 67,288.59
  4. Step 4: Simplify right side
    121,006.71x = 11,236,428,112.96
  5. Step 5: Solve for x
    x = 11,236,428,112.96/121,006.71
  6. Step 6: Final answer
    x = 92,857.89

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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.