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Finding the Fourth Proportional to 69,178.32, 103,730.36 and 21,784.56

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Solution

The fourth proportional to 69,178.32, 103,730.36 and 21,784.56 is: 32,665.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,178.32 : 103,730.36 = 21,784.56 : x
  2. Step 2: Convert to fraction form
    69,178.32/103,730.36 = 21,784.56/x
  3. Step 3: Cross multiply
    69,178.32x = 103,730.36 × 21,784.56
  4. Step 4: Simplify right side
    69,178.32x = 2,259,720,251.24
  5. Step 5: Solve for x
    x = 2,259,720,251.24/69,178.32
  6. Step 6: Final answer
    x = 32,665.15

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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.