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Finding the Fourth Proportional to 79,879, 109,973.90 and 62,853.24

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Solution

The fourth proportional to 79,879, 109,973.90 and 62,853.24 is: 86,533.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,879 : 109,973.90 = 62,853.24 : x
  2. Step 2: Convert to fraction form
    79,879/109,973.90 = 62,853.24/x
  3. Step 3: Cross multiply
    79,879x = 109,973.90 × 62,853.24
  4. Step 4: Simplify right side
    79,879x = 6,912,215,930.44
  5. Step 5: Solve for x
    x = 6,912,215,930.44/79,879
  6. Step 6: Final answer
    x = 86,533.58

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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.