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Finding the Fourth Proportional to 85,087.60, 127,631.40 and 75,902.20

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Solution

The fourth proportional to 85,087.60, 127,631.40 and 75,902.20 is: 113,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,087.60 : 127,631.40 = 75,902.20 : x
  2. Step 2: Convert to fraction form
    85,087.60/127,631.40 = 75,902.20/x
  3. Step 3: Cross multiply
    85,087.60x = 127,631.40 × 75,902.20
  4. Step 4: Simplify right side
    85,087.60x = 9,687,504,049.08
  5. Step 5: Solve for x
    x = 9,687,504,049.08/85,087.60
  6. Step 6: Final answer
    x = 113,853.30

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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.