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Finding the Fourth Proportional to 71,884.80, 99,200.16 and 40,053.60

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Solution

The fourth proportional to 71,884.80, 99,200.16 and 40,053.60 is: 55,273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,884.80 : 99,200.16 = 40,053.60 : x
  2. Step 2: Convert to fraction form
    71,884.80/99,200.16 = 40,053.60/x
  3. Step 3: Cross multiply
    71,884.80x = 99,200.16 × 40,053.60
  4. Step 4: Simplify right side
    71,884.80x = 3,973,323,528.58
  5. Step 5: Solve for x
    x = 3,973,323,528.58/71,884.80
  6. Step 6: Final answer
    x = 55,273.49

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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.