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Finding the Fourth Proportional to 215,846.60, 323,769.90 and 84,518.60

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Solution

The fourth proportional to 215,846.60, 323,769.90 and 84,518.60 is: 126,777.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,846.60 : 323,769.90 = 84,518.60 : x
  2. Step 2: Convert to fraction form
    215,846.60/323,769.90 = 84,518.60/x
  3. Step 3: Cross multiply
    215,846.60x = 323,769.90 × 84,518.60
  4. Step 4: Simplify right side
    215,846.60x = 27,364,578,670.14
  5. Step 5: Solve for x
    x = 27,364,578,670.14/215,846.60
  6. Step 6: Final answer
    x = 126,777.90

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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.