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Finding the Fourth Proportional to 120,103.55, 165,735.70 and 66,385.37

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Solution

The fourth proportional to 120,103.55, 165,735.70 and 66,385.37 is: 91,607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,103.55 : 165,735.70 = 66,385.37 : x
  2. Step 2: Convert to fraction form
    120,103.55/165,735.70 = 66,385.37/x
  3. Step 3: Cross multiply
    120,103.55x = 165,735.70 × 66,385.37
  4. Step 4: Simplify right side
    120,103.55x = 11,002,424,772.07
  5. Step 5: Solve for x
    x = 11,002,424,772.07/120,103.55
  6. Step 6: Final answer
    x = 91,607.82

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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.