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Finding the Fourth Proportional to 61,102.86, 91,668.87 and 21,663.42

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Solution

The fourth proportional to 61,102.86, 91,668.87 and 21,663.42 is: 32,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,102.86 : 91,668.87 = 21,663.42 : x
  2. Step 2: Convert to fraction form
    61,102.86/91,668.87 = 21,663.42/x
  3. Step 3: Cross multiply
    61,102.86x = 91,668.87 × 21,663.42
  4. Step 4: Simplify right side
    61,102.86x = 1,985,861,231.74
  5. Step 5: Solve for x
    x = 1,985,861,231.74/61,102.86
  6. Step 6: Final answer
    x = 32,500.30

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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.