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Finding the Fourth Proportional to 122,404.60, 183,714.90 and 72,422.20

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Solution

The fourth proportional to 122,404.60, 183,714.90 and 72,422.20 is: 108,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,404.60 : 183,714.90 = 72,422.20 : x
  2. Step 2: Convert to fraction form
    122,404.60/183,714.90 = 72,422.20/x
  3. Step 3: Cross multiply
    122,404.60x = 183,714.90 × 72,422.20
  4. Step 4: Simplify right side
    122,404.60x = 13,305,037,230.78
  5. Step 5: Solve for x
    x = 13,305,037,230.78/122,404.60
  6. Step 6: Final answer
    x = 108,697.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.