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Finding the Fourth Proportional to 120,185.87, 165,855.65 and 66,468.89

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Solution

The fourth proportional to 120,185.87, 165,855.65 and 66,468.89 is: 91,726.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185.87 : 165,855.65 = 66,468.89 : x
  2. Step 2: Convert to fraction form
    120,185.87/165,855.65 = 66,468.89/x
  3. Step 3: Cross multiply
    120,185.87x = 165,855.65 × 66,468.89
  4. Step 4: Simplify right side
    120,185.87x = 11,024,239,794.11
  5. Step 5: Solve for x
    x = 11,024,239,794.11/120,185.87
  6. Step 6: Final answer
    x = 91,726.59

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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.