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Finding the Fourth Proportional to 84,394.88, 126,639.84 and 58,120.64

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Solution

The fourth proportional to 84,394.88, 126,639.84 and 58,120.64 is: 87,213.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,394.88 : 126,639.84 = 58,120.64 : x
  2. Step 2: Convert to fraction form
    84,394.88/126,639.84 = 58,120.64/x
  3. Step 3: Cross multiply
    84,394.88x = 126,639.84 × 58,120.64
  4. Step 4: Simplify right side
    84,394.88x = 7,360,388,550.30
  5. Step 5: Solve for x
    x = 7,360,388,550.30/84,394.88
  6. Step 6: Final answer
    x = 87,213.69

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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.