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Finding the Fourth Proportional to 122,309.34, 168,630.60 and 79,212.69

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Solution

The fourth proportional to 122,309.34, 168,630.60 and 79,212.69 is: 109,212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,309.34 : 168,630.60 = 79,212.69 : x
  2. Step 2: Convert to fraction form
    122,309.34/168,630.60 = 79,212.69/x
  3. Step 3: Cross multiply
    122,309.34x = 168,630.60 × 79,212.69
  4. Step 4: Simplify right side
    122,309.34x = 13,357,683,442.31
  5. Step 5: Solve for x
    x = 13,357,683,442.31/122,309.34
  6. Step 6: Final answer
    x = 109,212.29

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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.