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Finding the Fourth Proportional to 259,872.08, 389,775.72 and 72,898.16

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Solution

The fourth proportional to 259,872.08, 389,775.72 and 72,898.16 is: 109,338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,872.08 : 389,775.72 = 72,898.16 : x
  2. Step 2: Convert to fraction form
    259,872.08/389,775.72 = 72,898.16/x
  3. Step 3: Cross multiply
    259,872.08x = 389,775.72 × 72,898.16
  4. Step 4: Simplify right side
    259,872.08x = 28,413,932,800.68
  5. Step 5: Solve for x
    x = 28,413,932,800.68/259,872.08
  6. Step 6: Final answer
    x = 109,338.15

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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.