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Finding the Fourth Proportional to 122,775.16, 184,162.74 and 81,212.44

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Solution

The fourth proportional to 122,775.16, 184,162.74 and 81,212.44 is: 121,818.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,775.16 : 184,162.74 = 81,212.44 : x
  2. Step 2: Convert to fraction form
    122,775.16/184,162.74 = 81,212.44/x
  3. Step 3: Cross multiply
    122,775.16x = 184,162.74 × 81,212.44
  4. Step 4: Simplify right side
    122,775.16x = 14,956,305,472.49
  5. Step 5: Solve for x
    x = 14,956,305,472.49/122,775.16
  6. Step 6: Final answer
    x = 121,818.66

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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.