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Finding the Fourth Proportional to 86,286.70, 129,434.10 and 27,124.30

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Solution

The fourth proportional to 86,286.70, 129,434.10 and 27,124.30 is: 40,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,286.70 : 129,434.10 = 27,124.30 : x
  2. Step 2: Convert to fraction form
    86,286.70/129,434.10 = 27,124.30/x
  3. Step 3: Cross multiply
    86,286.70x = 129,434.10 × 27,124.30
  4. Step 4: Simplify right side
    86,286.70x = 3,510,809,358.63
  5. Step 5: Solve for x
    x = 3,510,809,358.63/86,286.70
  6. Step 6: Final answer
    x = 40,687.72

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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.