Home / 52,081.36-78,121.30-12,638.80

Finding the Fourth Proportional to 52,081.36, 78,121.30 and 12,638.80

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Solution

The fourth proportional to 52,081.36, 78,121.30 and 12,638.80 is: 18,958.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,081.36 : 78,121.30 = 12,638.80 : x
  2. Step 2: Convert to fraction form
    52,081.36/78,121.30 = 12,638.80/x
  3. Step 3: Cross multiply
    52,081.36x = 78,121.30 × 12,638.80
  4. Step 4: Simplify right side
    52,081.36x = 987,359,486.44
  5. Step 5: Solve for x
    x = 987,359,486.44/52,081.36
  6. Step 6: Final answer
    x = 18,958.02

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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.