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Finding the Fourth Proportional to 71,976.60, 99,297.09 and 45,100.80

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Solution

The fourth proportional to 71,976.60, 99,297.09 and 45,100.80 is: 62,219.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,976.60 : 99,297.09 = 45,100.80 : x
  2. Step 2: Convert to fraction form
    71,976.60/99,297.09 = 45,100.80/x
  3. Step 3: Cross multiply
    71,976.60x = 99,297.09 × 45,100.80
  4. Step 4: Simplify right side
    71,976.60x = 4,478,378,196.67
  5. Step 5: Solve for x
    x = 4,478,378,196.67/71,976.60
  6. Step 6: Final answer
    x = 62,219.92

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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.