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Finding the Fourth Proportional to 79,318.80, 118,819.53 and 47,711.42

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Solution

The fourth proportional to 79,318.80, 118,819.53 and 47,711.42 is: 71,471.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,318.80 : 118,819.53 = 47,711.42 : x
  2. Step 2: Convert to fraction form
    79,318.80/118,819.53 = 47,711.42/x
  3. Step 3: Cross multiply
    79,318.80x = 118,819.53 × 47,711.42
  4. Step 4: Simplify right side
    79,318.80x = 5,669,047,905.93
  5. Step 5: Solve for x
    x = 5,669,047,905.93/79,318.80
  6. Step 6: Final answer
    x = 71,471.68

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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.