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Finding the Fourth Proportional to 318,958.21, 478,108.72 and 141,548.77

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Solution

The fourth proportional to 318,958.21, 478,108.72 and 141,548.77 is: 212,177.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,958.21 : 478,108.72 = 141,548.77 : x
  2. Step 2: Convert to fraction form
    318,958.21/478,108.72 = 141,548.77/x
  3. Step 3: Cross multiply
    318,958.21x = 478,108.72 × 141,548.77
  4. Step 4: Simplify right side
    318,958.21x = 67,675,701,242.27
  5. Step 5: Solve for x
    x = 67,675,701,242.27/318,958.21
  6. Step 6: Final answer
    x = 212,177.33

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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.