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Finding the Fourth Proportional to 122,611.68, 169,213.92 and 68,899.20

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Solution

The fourth proportional to 122,611.68, 169,213.92 and 68,899.20 is: 95,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,611.68 : 169,213.92 = 68,899.20 : x
  2. Step 2: Convert to fraction form
    122,611.68/169,213.92 = 68,899.20/x
  3. Step 3: Cross multiply
    122,611.68x = 169,213.92 × 68,899.20
  4. Step 4: Simplify right side
    122,611.68x = 11,658,703,716.86
  5. Step 5: Solve for x
    x = 11,658,703,716.86/122,611.68
  6. Step 6: Final answer
    x = 95,086.40

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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.