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Finding the Fourth Proportional to 318,931.91, 478,231.77 and 119,087.96

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Solution

The fourth proportional to 318,931.91, 478,231.77 and 119,087.96 is: 178,569.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,931.91 : 478,231.77 = 119,087.96 : x
  2. Step 2: Convert to fraction form
    318,931.91/478,231.77 = 119,087.96/x
  3. Step 3: Cross multiply
    318,931.91x = 478,231.77 × 119,087.96
  4. Step 4: Simplify right side
    318,931.91x = 56,951,645,896.49
  5. Step 5: Solve for x
    x = 56,951,645,896.49/318,931.91
  6. Step 6: Final answer
    x = 178,569.92

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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.