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Finding the Fourth Proportional to 122,418.32, 168,874.32 and 81,652.64

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Solution

The fourth proportional to 122,418.32, 168,874.32 and 81,652.64 is: 112,638.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,418.32 : 168,874.32 = 81,652.64 : x
  2. Step 2: Convert to fraction form
    122,418.32/168,874.32 = 81,652.64/x
  3. Step 3: Cross multiply
    122,418.32x = 168,874.32 × 81,652.64
  4. Step 4: Simplify right side
    122,418.32x = 13,789,034,056.20
  5. Step 5: Solve for x
    x = 13,789,034,056.20/122,418.32
  6. Step 6: Final answer
    x = 112,638.65

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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.