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Finding the Fourth Proportional to 120,034.45, 165,654.19 and 66,318.32

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Solution

The fourth proportional to 120,034.45, 165,654.19 and 66,318.32 is: 91,522.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,034.45 : 165,654.19 = 66,318.32 : x
  2. Step 2: Convert to fraction form
    120,034.45/165,654.19 = 66,318.32/x
  3. Step 3: Cross multiply
    120,034.45x = 165,654.19 × 66,318.32
  4. Step 4: Simplify right side
    120,034.45x = 10,985,906,587.69
  5. Step 5: Solve for x
    x = 10,985,906,587.69/120,034.45
  6. Step 6: Final answer
    x = 91,522.95

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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.