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Finding the Fourth Proportional to 215,800.89, 323,701.34 and 91,142.97

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Solution

The fourth proportional to 215,800.89, 323,701.34 and 91,142.97 is: 136,714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,800.89 : 323,701.34 = 91,142.97 : x
  2. Step 2: Convert to fraction form
    215,800.89/323,701.34 = 91,142.97/x
  3. Step 3: Cross multiply
    215,800.89x = 323,701.34 × 91,142.97
  4. Step 4: Simplify right side
    215,800.89x = 29,503,101,064.87
  5. Step 5: Solve for x
    x = 29,503,101,064.87/215,800.89
  6. Step 6: Final answer
    x = 136,714.46

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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.