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Finding the Fourth Proportional to 120,279.60, 165,987.90 and 65,836.53

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Solution

The fourth proportional to 120,279.60, 165,987.90 and 65,836.53 is: 90,855.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,279.60 : 165,987.90 = 65,836.53 : x
  2. Step 2: Convert to fraction form
    120,279.60/165,987.90 = 65,836.53/x
  3. Step 3: Cross multiply
    120,279.60x = 165,987.90 × 65,836.53
  4. Step 4: Simplify right side
    120,279.60x = 10,928,067,357.99
  5. Step 5: Solve for x
    x = 10,928,067,357.99/120,279.60
  6. Step 6: Final answer
    x = 90,855.53

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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.