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Finding the Fourth Proportional to 65,929.86, 98,900.87 and 21,556.85

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Solution

The fourth proportional to 65,929.86, 98,900.87 and 21,556.85 is: 32,337.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,929.86 : 98,900.87 = 21,556.85 : x
  2. Step 2: Convert to fraction form
    65,929.86/98,900.87 = 21,556.85/x
  3. Step 3: Cross multiply
    65,929.86x = 98,900.87 × 21,556.85
  4. Step 4: Simplify right side
    65,929.86x = 2,131,990,617.17
  5. Step 5: Solve for x
    x = 2,131,990,617.17/65,929.86
  6. Step 6: Final answer
    x = 32,337.25

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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.