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Finding the Fourth Proportional to 84,651.89, 126,929.23 and 25,470.05

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Solution

The fourth proportional to 84,651.89, 126,929.23 and 25,470.05 is: 38,190.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,651.89 : 126,929.23 = 25,470.05 : x
  2. Step 2: Convert to fraction form
    84,651.89/126,929.23 = 25,470.05/x
  3. Step 3: Cross multiply
    84,651.89x = 126,929.23 × 25,470.05
  4. Step 4: Simplify right side
    84,651.89x = 3,232,893,136.24
  5. Step 5: Solve for x
    x = 3,232,893,136.24/84,651.89
  6. Step 6: Final answer
    x = 38,190.44

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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.