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Finding the Fourth Proportional to 120,261.56, 165,960.18 and 66,545.56

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Solution

The fourth proportional to 120,261.56, 165,960.18 and 66,545.56 is: 91,832.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,261.56 : 165,960.18 = 66,545.56 : x
  2. Step 2: Convert to fraction form
    120,261.56/165,960.18 = 66,545.56/x
  3. Step 3: Cross multiply
    120,261.56x = 165,960.18 × 66,545.56
  4. Step 4: Simplify right side
    120,261.56x = 11,043,913,115.80
  5. Step 5: Solve for x
    x = 11,043,913,115.80/120,261.56
  6. Step 6: Final answer
    x = 91,832.45

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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.