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Finding the Fourth Proportional to 72,375.84, 108,555.12 and 19,789.92

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Solution

The fourth proportional to 72,375.84, 108,555.12 and 19,789.92 is: 29,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.84 : 108,555.12 = 19,789.92 : x
  2. Step 2: Convert to fraction form
    72,375.84/108,555.12 = 19,789.92/x
  3. Step 3: Cross multiply
    72,375.84x = 108,555.12 × 19,789.92
  4. Step 4: Simplify right side
    72,375.84x = 2,148,297,140.39
  5. Step 5: Solve for x
    x = 2,148,297,140.39/72,375.84
  6. Step 6: Final answer
    x = 29,682.52

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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.