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Finding the Fourth Proportional to 120,196.87, 165,860.54 and 66,480.74

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Solution

The fourth proportional to 120,196.87, 165,860.54 and 66,480.74 is: 91,737.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,196.87 : 165,860.54 = 66,480.74 : x
  2. Step 2: Convert to fraction form
    120,196.87/165,860.54 = 66,480.74/x
  3. Step 3: Cross multiply
    120,196.87x = 165,860.54 × 66,480.74
  4. Step 4: Simplify right side
    120,196.87x = 11,026,530,585.60
  5. Step 5: Solve for x
    x = 11,026,530,585.60/120,196.87
  6. Step 6: Final answer
    x = 91,737.25

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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.