Home / 78,122.18-117,225.90-33,136.52

Finding the Fourth Proportional to 78,122.18, 117,225.90 and 33,136.52

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Solution

The fourth proportional to 78,122.18, 117,225.90 and 33,136.52 is: 49,722.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.18 : 117,225.90 = 33,136.52 : x
  2. Step 2: Convert to fraction form
    78,122.18/117,225.90 = 33,136.52/x
  3. Step 3: Cross multiply
    78,122.18x = 117,225.90 × 33,136.52
  4. Step 4: Simplify right side
    78,122.18x = 3,884,458,379.87
  5. Step 5: Solve for x
    x = 3,884,458,379.87/78,122.18
  6. Step 6: Final answer
    x = 49,722.86

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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.