Home / 78,078.84-117,136.92-25,488.42

Finding the Fourth Proportional to 78,078.84, 117,136.92 and 25,488.42

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Solution

The fourth proportional to 78,078.84, 117,136.92 and 25,488.42 is: 38,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.84 : 117,136.92 = 25,488.42 : x
  2. Step 2: Convert to fraction form
    78,078.84/117,136.92 = 25,488.42/x
  3. Step 3: Cross multiply
    78,078.84x = 117,136.92 × 25,488.42
  4. Step 4: Simplify right side
    78,078.84x = 2,985,635,014.47
  5. Step 5: Solve for x
    x = 2,985,635,014.47/78,078.84
  6. Step 6: Final answer
    x = 38,238.72

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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.