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Finding the Fourth Proportional to 122,636.88, 169,243.56 and 74,911.68

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Solution

The fourth proportional to 122,636.88, 169,243.56 and 74,911.68 is: 103,380.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,636.88 : 169,243.56 = 74,911.68 : x
  2. Step 2: Convert to fraction form
    122,636.88/169,243.56 = 74,911.68/x
  3. Step 3: Cross multiply
    122,636.88x = 169,243.56 × 74,911.68
  4. Step 4: Simplify right side
    122,636.88x = 12,678,319,408.78
  5. Step 5: Solve for x
    x = 12,678,319,408.78/122,636.88
  6. Step 6: Final answer
    x = 103,380.97

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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.