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Finding the Fourth Proportional to 75,286.80, 112,912.20 and 43,628.40

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Solution

The fourth proportional to 75,286.80, 112,912.20 and 43,628.40 is: 65,432.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,286.80 : 112,912.20 = 43,628.40 : x
  2. Step 2: Convert to fraction form
    75,286.80/112,912.20 = 43,628.40/x
  3. Step 3: Cross multiply
    75,286.80x = 112,912.20 × 43,628.40
  4. Step 4: Simplify right side
    75,286.80x = 4,926,178,626.48
  5. Step 5: Solve for x
    x = 4,926,178,626.48/75,286.80
  6. Step 6: Final answer
    x = 65,432.17

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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.