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Finding the Fourth Proportional to 122,121.99, 168,610.59 and 76,251.48

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Solution

The fourth proportional to 122,121.99, 168,610.59 and 76,251.48 is: 105,278.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,121.99 : 168,610.59 = 76,251.48 : x
  2. Step 2: Convert to fraction form
    122,121.99/168,610.59 = 76,251.48/x
  3. Step 3: Cross multiply
    122,121.99x = 168,610.59 × 76,251.48
  4. Step 4: Simplify right side
    122,121.99x = 12,856,806,188.12
  5. Step 5: Solve for x
    x = 12,856,806,188.12/122,121.99
  6. Step 6: Final answer
    x = 105,278.39

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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.