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Finding the Fourth Proportional to 279,492.71, 419,290.11 and 129,712.37

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Solution

The fourth proportional to 279,492.71, 419,290.11 and 129,712.37 is: 194,592.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,492.71 : 419,290.11 = 129,712.37 : x
  2. Step 2: Convert to fraction form
    279,492.71/419,290.11 = 129,712.37/x
  3. Step 3: Cross multiply
    279,492.71x = 419,290.11 × 129,712.37
  4. Step 4: Simplify right side
    279,492.71x = 54,387,111,789.21
  5. Step 5: Solve for x
    x = 54,387,111,789.21/279,492.71
  6. Step 6: Final answer
    x = 194,592.24

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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.