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Finding the Fourth Proportional to 84,857.40, 127,286.10 and 74,489.40

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Solution

The fourth proportional to 84,857.40, 127,286.10 and 74,489.40 is: 111,734.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,857.40 : 127,286.10 = 74,489.40 : x
  2. Step 2: Convert to fraction form
    84,857.40/127,286.10 = 74,489.40/x
  3. Step 3: Cross multiply
    84,857.40x = 127,286.10 × 74,489.40
  4. Step 4: Simplify right side
    84,857.40x = 9,481,465,217.34
  5. Step 5: Solve for x
    x = 9,481,465,217.34/84,857.40
  6. Step 6: Final answer
    x = 111,734.10

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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.