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Finding the Fourth Proportional to 259,803.36, 389,729.88 and 72,814.32

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Solution

The fourth proportional to 259,803.36, 389,729.88 and 72,814.32 is: 109,228.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,803.36 : 389,729.88 = 72,814.32 : x
  2. Step 2: Convert to fraction form
    259,803.36/389,729.88 = 72,814.32/x
  3. Step 3: Cross multiply
    259,803.36x = 389,729.88 × 72,814.32
  4. Step 4: Simplify right side
    259,803.36x = 28,377,916,195.88
  5. Step 5: Solve for x
    x = 28,377,916,195.88/259,803.36
  6. Step 6: Final answer
    x = 109,228.44

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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.