Home / 128,435.20-192,582.78-39,672.16

Finding the Fourth Proportional to 128,435.20, 192,582.78 and 39,672.16

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Solution

The fourth proportional to 128,435.20, 192,582.78 and 39,672.16 is: 59,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.20 : 192,582.78 = 39,672.16 : x
  2. Step 2: Convert to fraction form
    128,435.20/192,582.78 = 39,672.16/x
  3. Step 3: Cross multiply
    128,435.20x = 192,582.78 × 39,672.16
  4. Step 4: Simplify right side
    128,435.20x = 7,640,174,861.40
  5. Step 5: Solve for x
    x = 7,640,174,861.40/128,435.20
  6. Step 6: Final answer
    x = 59,486.61

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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.