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Finding the Fourth Proportional to 134,649.11, 185,807.30 and 74,216.42

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Solution

The fourth proportional to 134,649.11, 185,807.30 and 74,216.42 is: 102,413.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,649.11 : 185,807.30 = 74,216.42 : x
  2. Step 2: Convert to fraction form
    134,649.11/185,807.30 = 74,216.42/x
  3. Step 3: Cross multiply
    134,649.11x = 185,807.30 × 74,216.42
  4. Step 4: Simplify right side
    134,649.11x = 13,789,951,315.75
  5. Step 5: Solve for x
    x = 13,789,951,315.75/134,649.11
  6. Step 6: Final answer
    x = 102,413.98

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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.