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Finding the Fourth Proportional to 71,748.99, 99,040.68 and 61,636.86

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Solution

The fourth proportional to 71,748.99, 99,040.68 and 61,636.86 is: 85,082.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,748.99 : 99,040.68 = 61,636.86 : x
  2. Step 2: Convert to fraction form
    71,748.99/99,040.68 = 61,636.86/x
  3. Step 3: Cross multiply
    71,748.99x = 99,040.68 × 61,636.86
  4. Step 4: Simplify right side
    71,748.99x = 6,104,556,527.46
  5. Step 5: Solve for x
    x = 6,104,556,527.46/71,748.99
  6. Step 6: Final answer
    x = 85,082.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.