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Finding the Fourth Proportional to 120,644.60, 166,482.20 and 66,195.59

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Solution

The fourth proportional to 120,644.60, 166,482.20 and 66,195.59 is: 91,345.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,644.60 : 166,482.20 = 66,195.59 : x
  2. Step 2: Convert to fraction form
    120,644.60/166,482.20 = 66,195.59/x
  3. Step 3: Cross multiply
    120,644.60x = 166,482.20 × 66,195.59
  4. Step 4: Simplify right side
    120,644.60x = 11,020,386,786.58
  5. Step 5: Solve for x
    x = 11,020,386,786.58/120,644.60
  6. Step 6: Final answer
    x = 91,345.88

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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.