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Finding the Fourth Proportional to 120,681.54, 166,540.80 and 66,966.71

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Solution

The fourth proportional to 120,681.54, 166,540.80 and 66,966.71 is: 92,414.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,681.54 : 166,540.80 = 66,966.71 : x
  2. Step 2: Convert to fraction form
    120,681.54/166,540.80 = 66,966.71/x
  3. Step 3: Cross multiply
    120,681.54x = 166,540.80 × 66,966.71
  4. Step 4: Simplify right side
    120,681.54x = 11,152,688,624.06
  5. Step 5: Solve for x
    x = 11,152,688,624.06/120,681.54
  6. Step 6: Final answer
    x = 92,414.21

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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.