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Finding the Fourth Proportional to 72,425.97, 99,911.21 and 53,530.29

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Solution

The fourth proportional to 72,425.97, 99,911.21 and 53,530.29 is: 73,844.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425.97 : 99,911.21 = 53,530.29 : x
  2. Step 2: Convert to fraction form
    72,425.97/99,911.21 = 53,530.29/x
  3. Step 3: Cross multiply
    72,425.97x = 99,911.21 × 53,530.29
  4. Step 4: Simplify right side
    72,425.97x = 5,348,275,777.90
  5. Step 5: Solve for x
    x = 5,348,275,777.90/72,425.97
  6. Step 6: Final answer
    x = 73,844.72

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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.