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Finding the Fourth Proportional to 71,720.30, 107,468.00 and 45,369.38

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Solution

The fourth proportional to 71,720.30, 107,468.00 and 45,369.38 is: 67,982.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.30 : 107,468.00 = 45,369.38 : x
  2. Step 2: Convert to fraction form
    71,720.30/107,468.00 = 45,369.38/x
  3. Step 3: Cross multiply
    71,720.30x = 107,468.00 × 45,369.38
  4. Step 4: Simplify right side
    71,720.30x = 4,875,756,105.92
  5. Step 5: Solve for x
    x = 4,875,756,105.92/71,720.30
  6. Step 6: Final answer
    x = 67,982.93

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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.