Home / 122,748.20-169,335.32-79,724.64

Finding the Fourth Proportional to 122,748.20, 169,335.32 and 79,724.64

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Solution

The fourth proportional to 122,748.20, 169,335.32 and 79,724.64 is: 109,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,748.20 : 169,335.32 = 79,724.64 : x
  2. Step 2: Convert to fraction form
    122,748.20/169,335.32 = 79,724.64/x
  3. Step 3: Cross multiply
    122,748.20x = 169,335.32 × 79,724.64
  4. Step 4: Simplify right side
    122,748.20x = 13,500,197,027.66
  5. Step 5: Solve for x
    x = 13,500,197,027.66/122,748.20
  6. Step 6: Final answer
    x = 109,982.86

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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.