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Finding the Fourth Proportional to 239,479.89, 359,230.77 and 81,709.71

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Solution

The fourth proportional to 239,479.89, 359,230.77 and 81,709.71 is: 122,568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,479.89 : 359,230.77 = 81,709.71 : x
  2. Step 2: Convert to fraction form
    239,479.89/359,230.77 = 81,709.71/x
  3. Step 3: Cross multiply
    239,479.89x = 359,230.77 × 81,709.71
  4. Step 4: Simplify right side
    239,479.89x = 29,352,642,039.78
  5. Step 5: Solve for x
    x = 29,352,642,039.78/239,479.89
  6. Step 6: Final answer
    x = 122,568.30

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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.