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Finding the Fourth Proportional to 122,410.32, 168,863.28 and 81,644.64

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Solution

The fourth proportional to 122,410.32, 168,863.28 and 81,644.64 is: 112,627.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,410.32 : 168,863.28 = 81,644.64 : x
  2. Step 2: Convert to fraction form
    122,410.32/168,863.28 = 81,644.64/x
  3. Step 3: Cross multiply
    122,410.32x = 168,863.28 × 81,644.64
  4. Step 4: Simplify right side
    122,410.32x = 13,786,781,704.82
  5. Step 5: Solve for x
    x = 13,786,781,704.82/122,410.32
  6. Step 6: Final answer
    x = 112,627.61

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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.