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Finding the Fourth Proportional to 85,475.80, 128,175.30 and 32,867.80

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Solution

The fourth proportional to 85,475.80, 128,175.30 and 32,867.80 is: 49,286.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,475.80 : 128,175.30 = 32,867.80 : x
  2. Step 2: Convert to fraction form
    85,475.80/128,175.30 = 32,867.80/x
  3. Step 3: Cross multiply
    85,475.80x = 128,175.30 × 32,867.80
  4. Step 4: Simplify right side
    85,475.80x = 4,212,840,125.34
  5. Step 5: Solve for x
    x = 4,212,840,125.34/85,475.80
  6. Step 6: Final answer
    x = 49,286.93

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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.