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Finding the Fourth Proportional to 71,625.87, 107,413.38 and 21,010.77

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Solution

The fourth proportional to 71,625.87, 107,413.38 and 21,010.77 is: 31,508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,625.87 : 107,413.38 = 21,010.77 : x
  2. Step 2: Convert to fraction form
    71,625.87/107,413.38 = 21,010.77/x
  3. Step 3: Cross multiply
    71,625.87x = 107,413.38 × 21,010.77
  4. Step 4: Simplify right side
    71,625.87x = 2,256,837,822.10
  5. Step 5: Solve for x
    x = 2,256,837,822.10/71,625.87
  6. Step 6: Final answer
    x = 31,508.70

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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.