Home / 259,919.28-389,892.69-72,945.36

Finding the Fourth Proportional to 259,919.28, 389,892.69 and 72,945.36

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Solution

The fourth proportional to 259,919.28, 389,892.69 and 72,945.36 is: 109,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,919.28 : 389,892.69 = 72,945.36 : x
  2. Step 2: Convert to fraction form
    259,919.28/389,892.69 = 72,945.36/x
  3. Step 3: Cross multiply
    259,919.28x = 389,892.69 × 72,945.36
  4. Step 4: Simplify right side
    259,919.28x = 28,440,862,633.42
  5. Step 5: Solve for x
    x = 28,440,862,633.42/259,919.28
  6. Step 6: Final answer
    x = 109,421.90

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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.