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Finding the Fourth Proportional to 62,940.85, 94,388.78 and 20,813.16

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Solution

The fourth proportional to 62,940.85, 94,388.78 and 20,813.16 is: 31,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,940.85 : 94,388.78 = 20,813.16 : x
  2. Step 2: Convert to fraction form
    62,940.85/94,388.78 = 20,813.16/x
  3. Step 3: Cross multiply
    62,940.85x = 94,388.78 × 20,813.16
  4. Step 4: Simplify right side
    62,940.85x = 1,964,528,780.34
  5. Step 5: Solve for x
    x = 1,964,528,780.34/62,940.85
  6. Step 6: Final answer
    x = 31,212.30

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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.