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Finding the Fourth Proportional to 120,495.71, 166,279.55 and 66,781.64

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Solution

The fourth proportional to 120,495.71, 166,279.55 and 66,781.64 is: 92,156.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,495.71 : 166,279.55 = 66,781.64 : x
  2. Step 2: Convert to fraction form
    120,495.71/166,279.55 = 66,781.64/x
  3. Step 3: Cross multiply
    120,495.71x = 166,279.55 × 66,781.64
  4. Step 4: Simplify right side
    120,495.71x = 11,104,419,882.16
  5. Step 5: Solve for x
    x = 11,104,419,882.16/120,495.71
  6. Step 6: Final answer
    x = 92,156.15

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1.5x scale

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.