Home / 52,081.14-78,121.90-12,638.25

Finding the Fourth Proportional to 52,081.14, 78,121.90 and 12,638.25

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Solution

The fourth proportional to 52,081.14, 78,121.90 and 12,638.25 is: 18,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,081.14 : 78,121.90 = 12,638.25 : x
  2. Step 2: Convert to fraction form
    52,081.14/78,121.90 = 12,638.25/x
  3. Step 3: Cross multiply
    52,081.14x = 78,121.90 × 12,638.25
  4. Step 4: Simplify right side
    52,081.14x = 987,324,495.11
  5. Step 5: Solve for x
    x = 987,324,495.11/52,081.14
  6. Step 6: Final answer
    x = 18,957.43

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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.