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Finding the Fourth Proportional to 65,940.54, 98,888.67 and 21,556.91

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Solution

The fourth proportional to 65,940.54, 98,888.67 and 21,556.91 is: 32,328.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,940.54 : 98,888.67 = 21,556.91 : x
  2. Step 2: Convert to fraction form
    65,940.54/98,888.67 = 21,556.91/x
  3. Step 3: Cross multiply
    65,940.54x = 98,888.67 × 21,556.91
  4. Step 4: Simplify right side
    65,940.54x = 2,131,733,664.77
  5. Step 5: Solve for x
    x = 2,131,733,664.77/65,940.54
  6. Step 6: Final answer
    x = 32,328.12

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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.