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Finding the Fourth Proportional to 331,181.96, 496,683.74 and 91,238.72

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Solution

The fourth proportional to 331,181.96, 496,683.74 and 91,238.72 is: 136,833.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,181.96 : 496,683.74 = 91,238.72 : x
  2. Step 2: Convert to fraction form
    331,181.96/496,683.74 = 91,238.72/x
  3. Step 3: Cross multiply
    331,181.96x = 496,683.74 × 91,238.72
  4. Step 4: Simplify right side
    331,181.96x = 45,316,788,682.41
  5. Step 5: Solve for x
    x = 45,316,788,682.41/331,181.96
  6. Step 6: Final answer
    x = 136,833.51

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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.