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Finding the Fourth Proportional to 85,546.60, 128,538.60 and 75,923.80

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Solution

The fourth proportional to 85,546.60, 128,538.60 and 75,923.80 is: 114,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,546.60 : 128,538.60 = 75,923.80 : x
  2. Step 2: Convert to fraction form
    85,546.60/128,538.60 = 75,923.80/x
  3. Step 3: Cross multiply
    85,546.60x = 128,538.60 × 75,923.80
  4. Step 4: Simplify right side
    85,546.60x = 9,759,138,958.68
  5. Step 5: Solve for x
    x = 9,759,138,958.68/85,546.60
  6. Step 6: Final answer
    x = 114,079.80

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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.