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Finding the Fourth Proportional to 50,709.64, 69,979.76 and 28,047.44

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Solution

The fourth proportional to 50,709.64, 69,979.76 and 28,047.44 is: 38,705.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,709.64 : 69,979.76 = 28,047.44 : x
  2. Step 2: Convert to fraction form
    50,709.64/69,979.76 = 28,047.44/x
  3. Step 3: Cross multiply
    50,709.64x = 69,979.76 × 28,047.44
  4. Step 4: Simplify right side
    50,709.64x = 1,962,753,119.81
  5. Step 5: Solve for x
    x = 1,962,753,119.81/50,709.64
  6. Step 6: Final answer
    x = 38,705.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.