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Finding the Fourth Proportional to 122,279.72, 168,742.51 and 74,515.64

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Solution

The fourth proportional to 122,279.72, 168,742.51 and 74,515.64 is: 102,829.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,279.72 : 168,742.51 = 74,515.64 : x
  2. Step 2: Convert to fraction form
    122,279.72/168,742.51 = 74,515.64/x
  3. Step 3: Cross multiply
    122,279.72x = 168,742.51 × 74,515.64
  4. Step 4: Simplify right side
    122,279.72x = 12,573,955,097.85
  5. Step 5: Solve for x
    x = 12,573,955,097.85/122,279.72
  6. Step 6: Final answer
    x = 102,829.44

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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.