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Finding the Fourth Proportional to 479,651.20, 719,413.44 and 124,689.76

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Solution

The fourth proportional to 479,651.20, 719,413.44 and 124,689.76 is: 187,018.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,651.20 : 719,413.44 = 124,689.76 : x
  2. Step 2: Convert to fraction form
    479,651.20/719,413.44 = 124,689.76/x
  3. Step 3: Cross multiply
    479,651.20x = 719,413.44 × 124,689.76
  4. Step 4: Simplify right side
    479,651.20x = 89,703,489,174.37
  5. Step 5: Solve for x
    x = 89,703,489,174.37/479,651.20
  6. Step 6: Final answer
    x = 187,018.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.