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Finding the Fourth Proportional to 71,884.68, 99,172.74 and 45,015.72

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Solution

The fourth proportional to 71,884.68, 99,172.74 and 45,015.72 is: 62,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,884.68 : 99,172.74 = 45,015.72 : x
  2. Step 2: Convert to fraction form
    71,884.68/99,172.74 = 45,015.72/x
  3. Step 3: Cross multiply
    71,884.68x = 99,172.74 × 45,015.72
  4. Step 4: Simplify right side
    71,884.68x = 4,464,332,295.47
  5. Step 5: Solve for x
    x = 4,464,332,295.47/71,884.68
  6. Step 6: Final answer
    x = 62,104.09

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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.