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Finding the Fourth Proportional to 189,958.70, 284,938.05 and 79,136.30

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Solution

The fourth proportional to 189,958.70, 284,938.05 and 79,136.30 is: 118,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,958.70 : 284,938.05 = 79,136.30 : x
  2. Step 2: Convert to fraction form
    189,958.70/284,938.05 = 79,136.30/x
  3. Step 3: Cross multiply
    189,958.70x = 284,938.05 × 79,136.30
  4. Step 4: Simplify right side
    189,958.70x = 22,548,943,006.22
  5. Step 5: Solve for x
    x = 22,548,943,006.22/189,958.70
  6. Step 6: Final answer
    x = 118,704.45

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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.