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Finding the Fourth Proportional to 120,716.60, 181,074.90 and 76,101.80

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Solution

The fourth proportional to 120,716.60, 181,074.90 and 76,101.80 is: 114,152.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,716.60 : 181,074.90 = 76,101.80 : x
  2. Step 2: Convert to fraction form
    120,716.60/181,074.90 = 76,101.80/x
  3. Step 3: Cross multiply
    120,716.60x = 181,074.90 × 76,101.80
  4. Step 4: Simplify right side
    120,716.60x = 13,780,125,824.82
  5. Step 5: Solve for x
    x = 13,780,125,824.82/120,716.60
  6. Step 6: Final answer
    x = 114,152.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.