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Finding the Fourth Proportional to 279,512.51, 419,352.71 and 87,379.20

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Solution

The fourth proportional to 279,512.51, 419,352.71 and 87,379.20 is: 131,095.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,512.51 : 419,352.71 = 87,379.20 : x
  2. Step 2: Convert to fraction form
    279,512.51/419,352.71 = 87,379.20/x
  3. Step 3: Cross multiply
    279,512.51x = 419,352.71 × 87,379.20
  4. Step 4: Simplify right side
    279,512.51x = 36,642,703,880.74
  5. Step 5: Solve for x
    x = 36,642,703,880.74/279,512.51
  6. Step 6: Final answer
    x = 131,095.04

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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.