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Finding the Fourth Proportional to 79,357.78, 118,991.53 and 61,339.62

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Solution

The fourth proportional to 79,357.78, 118,991.53 and 61,339.62 is: 91,974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,357.78 : 118,991.53 = 61,339.62 : x
  2. Step 2: Convert to fraction form
    79,357.78/118,991.53 = 61,339.62/x
  3. Step 3: Cross multiply
    79,357.78x = 118,991.53 × 61,339.62
  4. Step 4: Simplify right side
    79,357.78x = 7,298,895,233.42
  5. Step 5: Solve for x
    x = 7,298,895,233.42/79,357.78
  6. Step 6: Final answer
    x = 91,974.54

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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.