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Finding the Fourth Proportional to 122,396.22, 168,961.61 and 74,668.59

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Solution

The fourth proportional to 122,396.22, 168,961.61 and 74,668.59 is: 103,076.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,396.22 : 168,961.61 = 74,668.59 : x
  2. Step 2: Convert to fraction form
    122,396.22/168,961.61 = 74,668.59/x
  3. Step 3: Cross multiply
    122,396.22x = 168,961.61 × 74,668.59
  4. Step 4: Simplify right side
    122,396.22x = 12,616,125,182.83
  5. Step 5: Solve for x
    x = 12,616,125,182.83/122,396.22
  6. Step 6: Final answer
    x = 103,076.10

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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.