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Finding the Fourth Proportional to 79,118.94, 109,215.64 and 51,905.38

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Solution

The fourth proportional to 79,118.94, 109,215.64 and 51,905.38 is: 71,650.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,118.94 : 109,215.64 = 51,905.38 : x
  2. Step 2: Convert to fraction form
    79,118.94/109,215.64 = 51,905.38/x
  3. Step 3: Cross multiply
    79,118.94x = 109,215.64 × 51,905.38
  4. Step 4: Simplify right side
    79,118.94x = 5,668,879,296.14
  5. Step 5: Solve for x
    x = 5,668,879,296.14/79,118.94
  6. Step 6: Final answer
    x = 71,650.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.