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Finding the Fourth Proportional to 122,874.72, 184,279.20 and 75,783.12

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Solution

The fourth proportional to 122,874.72, 184,279.20 and 75,783.12 is: 113,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,874.72 : 184,279.20 = 75,783.12 : x
  2. Step 2: Convert to fraction form
    122,874.72/184,279.20 = 75,783.12/x
  3. Step 3: Cross multiply
    122,874.72x = 184,279.20 × 75,783.12
  4. Step 4: Simplify right side
    122,874.72x = 13,965,252,727.10
  5. Step 5: Solve for x
    x = 13,965,252,727.10/122,874.72
  6. Step 6: Final answer
    x = 113,654.40

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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.