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Finding the Fourth Proportional to 73,051.20, 108,935.42 and 72,385.92

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Solution

The fourth proportional to 73,051.20, 108,935.42 and 72,385.92 is: 107,943.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,051.20 : 108,935.42 = 72,385.92 : x
  2. Step 2: Convert to fraction form
    73,051.20/108,935.42 = 72,385.92/x
  3. Step 3: Cross multiply
    73,051.20x = 108,935.42 × 72,385.92
  4. Step 4: Simplify right side
    73,051.20x = 7,885,390,235.36
  5. Step 5: Solve for x
    x = 7,885,390,235.36/73,051.20
  6. Step 6: Final answer
    x = 107,943.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.