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Finding the Fourth Proportional to 122,405.30, 168,876.01 and 79,988.44

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Solution

The fourth proportional to 122,405.30, 168,876.01 and 79,988.44 is: 110,355.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,405.30 : 168,876.01 = 79,988.44 : x
  2. Step 2: Convert to fraction form
    122,405.30/168,876.01 = 79,988.44/x
  3. Step 3: Cross multiply
    122,405.30x = 168,876.01 × 79,988.44
  4. Step 4: Simplify right side
    122,405.30x = 13,508,127,662.86
  5. Step 5: Solve for x
    x = 13,508,127,662.86/122,405.30
  6. Step 6: Final answer
    x = 110,355.74

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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.